My Motorola Android phone does not work outside of the U.S. Does the Samsung Galaxy have the same problem? Will the forthcoming Verizon iPhone work in Europe?

A:

I combined two reader questions here, because they both touch on a common source of confusion. I presume that the Motorola Android phone that only works in the U.S. is sold by either Verizon or Sprint, because they use network technology that is primarily found in the U.S., and not, say, in Europe. Thus, phone makers like Motorola and Samsung tailor their Verizon and Sprint models to this U.S.-centric technology, called CDMA.

However, both Motorola and Samsung also make Android phones for AT&T and T-Mobile, which use a network technology called GSM that is standard in most of the rest of the world. These models should work outside of the U.S. There are a few “world phones” sold by Verizon and Sprint, which include both network technologies. For instance, Verizon sells two Android phones, the Droid Pro and the Droid 2 Global, which fall into that category.

As for the reported forthcoming Verizon iPhone, I don’t know if it will be limited to CDMA, which would make it essentially a U.S.-only device, or whether it will also be compatible with GSM, which would make it a world phone.

Q:

I live in South Africa, and want to buy the Samsung Tab to make my job easier, but to do that I must be able to work with Microsoft Excel documents. Editing and using dropdown boxes is essential. Can this be done?

A:

The Tab, and other Android devices, can view and edit Excel documents using either a built-in mobile office suite (ThinkFree was pre-installed on the Tab I tested) or one you can obtain through the Android Market, like Quickoffice. You can also use online spreadsheet apps.

However, as with the same or similar apps for the iPad, these are limited compared to using Excel on a PC or Mac, and I cannot say whether they’d have the features and two-way document fidelity you personally might require. I didn’t test editing Excel documents on the Tab.

Q:

I am considering purchasing the iPad but have learned that it does not allow users to create folders in which documents can be stored. This would be incredibly useful for me for business purposes while I travel (i.e., separate client folders with client-specific documents in each). I have heard that Apple’s new operating system upgrade might make this possible, but I haven’t been able to confirm it. Do you happen to know whether that is the case?

A:

The new folder feature coming to the iPad is meant for grouping apps, not documents. Apple’s operating system for its mobile devices, called iOS, doesn’t have a global document folder capability.

However, individual iPad apps, such as the very powerful GoodReader, do allow you to create folders that can hold all manner of documents, and you can name and organize these folders as you wish. But these folders are only accessible from within the app that creates them.

You can find Mossberg’s Mailbox, and my other columns at the All Things Digital website, http://walt.allthingsd.com.

Make no mistake–there are no definitive offers on the table to do a variety of takeover deals of Yahoo by either private equity moneybags or from big media giants such as News Corp. or smaller Web firms such as AOL.

But that does not mean that major players are not circling Yahoo (YHOO) and assessing the situation aggressively, a fact reflected in the rise in the Internet giant’s stock price today based on the many rumors swirling around it.

Despite being news to some, BoomTown had previously written about all these various scenarios, including interest from News Corp. and AOL, after the recent departure of a trio of top Yahoo media and sales execs brought into sharp relief the pressure that CEO Carol Bartz is under to turn around the company.

Yahoo shares were up almost six percent to close at $15.25, a high of late. It is up to $16.20 in after-hours trading.

According to sources close to the situation, that’s because big PE firms such as Silver Lake Partners, as well as News Corp. (NWS), AOL (AOL) and others, all have their PowerPoints and speadsheets opened up to try to figure out if there is a deal to be made to buy all or a piece of Yahoo in the wake of corporate turmoil, slow revenue growth and weak stock under the leadership of CEO Carol Bartz.

Sources said the key players in the growing soap opera are the execs who run Yahoo-affiliated companies in Japan and China. That would be Masayoshi Son of Yahoo Japan and Jack Ma of the Alibaba Group.

Yahoo owns big and lucrative stakes in both companies, assets which make up a big part of the company’s current valuation.

The sale of those stakes is what has some investors interested, since–if thorny tax issues can be solved–it would make the purchase of part or all of the well-known Silicon Valley company very inexpensive in relative terms.

Sources added that any approach would have to be nonhostile, since Yahoo still has some stringent antitakeover provisions in place from a hostile attempt a few years ago by Microsoft (MSFT).

But alternate CEOs to Bartz are part of the ruminations:

As I wrote two weeks ago, which was again reported today:

Most frequently mentioned by big investors in Yahoo: AOL (AOL) and its CEO Tim Armstrong.

Armstrong, said sources, has not shied away from the idea of Yahoo acquiring AOL and installing him as CEO with Bartz as chairman. AOL’s valuation is just $2.65 billion.

Although AOL has also been trying to turn itself around and is in a much less powerful position than Yahoo, Wall Street likes Armstrong’s story for AOL as a modern-day media and media distribution company.

“At least he has a narrative that is believable,” said one big investor in both companies. “Bartz has no vision.”

Among the other credible candidates most mentioned: News Corp. digital head Jon Miller, if the media giant were part of any deal, and Juniper Networks (JNPR) CEO Kevin Johnson, who was the architect of the failed acquisition of Yahoo by Microsoft.

What’s interesting here is what the board–and, most specifically, co-founder and former CEO Jerry Yang–is doing now.

For certain, it is receiving an incoming flood of negative communications from big shareholders, most of whom are unhappy with Bartz’s management. One big investor recently told board members that their continued inaction in the face of all the trouble was unsettling.

One big event coming up is the third-quarter earnings report by Yahoo on Tuesday, after the market closes.

If Yahoo’s sales remain as flat as they were in the second quarter, even with improved earnings, there will be even more scrutiny of Bartz to find growth.

And if Yahoo misses? Watch out.

One way might be via a big acquisition. Yahoo has recently been contemplating the local space, especially social discounting phenom Groupon. But the price would have to be high, sources said–well above $2 billion in cash and stock.

Would such a bold move be enough to keep the predators of Yahoo at bay? We’ll see, as the purple world turns.

A Yahoo PR person declined to comment on the stock rise.

Of course, rising on speculation, a higher stock is a problem for acquirers, as it makes Yahoo more expensive. Still, sources said a Yahoo deal of about $20 a share is entirely “doable.”

This week I tested Postbox 1.0, a program designed to handle your email in a smart, helpful manner. Starting Wednesday, this program is available at www.Postbox-Inc.com. Postbox sorts through your email and detects its contents so you can see Web links, photos, contacts and other items themselves with one button click—whether Microsoft Word (MSFT) documents, PDFs or spreadsheets—without digging through messages. Since its inbox is constantly being indexed, all search queries return near-instant results.

Postbox uses an Inspector Pane on the right side of each email to extract and display elements like images, attachments and contact information.

Postbox’s founders come from Mozilla Corp., maker of the popular Firefox browser, so Postbox is based on Mozilla technology and its security standards. Email is indexed locally on your computer, so none of it is sent back across the Web to Postbox. It uses Content Tabs (tabs are another feature borrowed from Firefox) to help visually organize folders, messages and content extracted from those messages. It displays the most important elements of each message in a right-side panel. Received emails can even be edited so they aren’t sitting in your inbox with subject lines like, “Fw: Re: Re: Sept.” Instead, you can rewrite the subject to something like “Flight times.”

But this program isn’t free like Gmail, Hotmail or other Web-based email programs, nor does it come preloaded on a computer the way Apple Mail (AAPL) is on every Mac. Users can try Postbox for a free 30-day trial period after which each license costs $40, allowing one person to use their license on multiple computers (i.e. at work, at home, on a laptop). For another $20, a Family Pack option will give up to five family members use of Postbox. An additional $25 buys a Lifetime Upgrades plan that entitles you to receive free of charge any major version of Postbox that’s released; other nonmajor releases are free upgrades.

I used Postbox on a Mac and a Windows Vista computer, filling it up with thousands of emails from Gmail, Hotmail and .Mac accounts. It didn’t run properly on my company-issued computer, which is plugged into a network firewall. Postbox says it supports open protocols like IMPAP, POP and SMTP, and that it would work with Microsoft Exchange if Exchange were set to use those open protocols.

For all of Postbox’s terrific features, it can be hard to suddenly see your email in a different way since most of our email programs haven’t changed much in years. Outlook, for example, has plenty of hidden features that many people never learn how to use. Postbox seems to know how slow users are to adapt to change and so it reveals many of its features whenever it gets the chance.

For example, Postbox pops up an alert that shows you how to connect this email program to Facebook and Twitter so that you can post status updates or tweets without leaving your email. These connections also let Postbox try to pull one representative photo for each of your email contacts by matching a name in an email with someone’s Facebook or Twitter name—if you follow the person. It also uses photos assigned to contacts in the Mac OS X address book, which is used by Apple Mail.

Or take a feature in Postbox called Topics. This is a way of auto-organizing messages into different groups after you label them as being part of a certain topic, say “Mom’s Birthday.” All messages in an email conversation are grouped into “Mom’s Birthday,” as are any future responses to the same conversation. Postbox gives you three ways to label an email conversation as being part of a certain topic: from the toolbar, using a Topics button in the message header or by pressing “T” from within a message. You can also select a topic as you’re composing an email, pre-sorting that conversation into a designated topic.

Not everyone will like Topics because, however helpful the feature is, it makes the user do more work when he or she just want to get through a huge pile of unread emails. Labeling each email with a certain topic doesn’t take long, but it’s still an extra step. I would like Postbox to create automatic topics for sorting emails. For example, I recently sent and received at least 50 emails related to rescheduling tennis matches. Even though all the messages had the word “tennis” in them, not all of them were related to the same email, so they wouldn’t sort into the topic I created, “Tennis Make-Up.” Postbox says it has considered automatic options like these and may try to incorporate something similar in future versions of the product.

If my 30-day trial ran out tomorrow, I’d miss Postbox’s Inspector Bar the most. This feature works like a filter, instantly sucking out the most important parts in each email—including messages, attachments, images or links—and displaying them in a blue, right-side panel.

Another useful tool in Postbox is the Compose Sidebar. This also appears as a right-side panel but it shows up when someone is writing an email. This panel can display attachments, images, links or contacts found in all emails so you can simply drag and drop that item into your email as you’re composing it. This took me a while to get comfortable using because I’m so used to hunting through emails for things that I need to find. But once it became a habit, I found myself using the Compose Sidebar often.

If you have Postbox running in the background and you get an email, small notifications appear in the bottom left of your screen telling you which email account received the message and who sent it.

In the Content Tabs, which fill up with all attachments, images, links or contacts found in your indexed email, a feature called the Action Bar lets you save, send, or instantly glance at a document. This saves you from opening each email and its attachment, a process that sometimes requires opening a slow-to-open program to see the document. A slider in this Action Bar lets you adjust the size of images from small to large.

Postbox shines a unique light on email and the way we work with it every day. Not all of its features will come naturally for long-time users of the same email program. But for someone who wants a fast search option built into email, Postbox is a winner.

Edited by Walter S. Mossberg.

Email mossbergsolution@wsj.com

Here are a few questions about computers I’ve received recently from people like you, and my answers. I have edited and restated the questions a bit, for readability.

I have a PC with Windows XP, which I bought because my computer guru said to stay away from Vista. I read your column saying upgrading from XP to the new Windows 7 will be much more cumbersome than doing so from Windows Vista. So, what should I do now? Upgrade to Vista for a while so I can then move more smoothly to 7? Or wait, buy a separate Windows 7 computer in the fall, and just transfer my files and applications from the XP computer?

Putting budget considerations aside, I think the latter course would make more sense. The new machine with Windows 7 preloaded will probably give you smoother performance than one you upgraded twice to new operating systems in a matter of months. But, bear in mind that you will have to reinstall all your applications on the new Windows 7 computer, and that, depending on the terms of the applications’ licenses, you might even have to buy new copies. On the other hand, if you do the chain of upgrades, and don’t buy a new machine, you may be able to avoid this application problem, or at least much of it.

I appreciated your review of the Clickfree automatic backup drive. Does the backup it creates include the various folders and subfolders for data such as photos, or does it just create a huge single list?

The Clickfree software is primarily designed to back up, display and restore your files by their types — photos, music, text, email, spreadsheets, etc. Once it has performed a backup it lets you view and restore your files by these types. However, it will display the tree of all your folders and allow you to specify where it should search for these files. It also allows you to back up and restore entire folders, such as your My Documents folder, regardless of their contents. Detailed information, including a downloadable user manual, is available in the Support section of clickfree.com.

I am planning to buy one of the products you recently reviewed — a Western Digital My Book — and attach it directly to a port on my Internet router. Can I install antispyware and antivirus programs on the drive? If not, how will the data on this drive be protected?

Nothing is perfectly secure. The bad guys are clever, and you never say never. However, since this product isn’t an actual PC running Windows, viruses and spyware programs can’t likely run directly on it. Still, if one of your computers contains malicious software, and it can see the contents of the network drive, then the data on the drive could be endangered. I know of no way to install or run security programs on the drive. But the security software on your PC may protect the drive, if it is able to handle external drives across a network. Also, the firewall built into your network router will help. The product has some security measures built in, such as encrypting files when you use the optional feature that allows you to access the drive’s contents across the Internet.

• You can find Mossberg’s Mailbox, and my other columns, online free of charge at the new All Things Digital Web site, http://walt.allthingsd.com.

Gabriel Stricker, Google’s Director of Search Communications kicks things off by noting that the company will be sharing a number of new developments that cater to the growing demands of its users. With that, Udi Manber takes the stage to offer a big-picture overview of search.

Manber says what Google does is the new “rocket science.” Search has to be fast, relevant, and fresh, he explains. But even that’s not enough. The real goal is to solve users’ problems. If users can’t spell, it’s our problem. If the content is there but in a language the user doesn’t speak, that’s our problem. If the Web is too slow, it’s our problem. Manber offers a few examples of how Google works to address these challenges: real-time data, translation, etc. With these services nailed down, he says, Google can move on to the more important task of working on “understanding.”

Manber invites Pat Riley, senior search quality engineer, to the stage to talk a bit about Google’s “did you mean” link. Lots of people use the link, Riley says, and Google has been working to improve it. Called “spellmillion,” the project provides not only related results for a misspelled query but for alternate ones as well (think labor as in “work” and labor as in “pregnancy”). But it requires Google to process multiple searches for a single query and demands a lot of processing power.

Riley notes that the project has been somewhat contentious because it also potentially questions user intent. He offers the example of “Macy Ray.” Some users might be searching for “Macy Gray,” the singer, others for a person actually named “Macy Ray.” How do you address those two potential queries on a single search results page?

Riley is followed by Engineering Director Scott Huffman, whose subject is mobile search. Huffman starts things off with a few truisms. Mobile search is often local. It should be easy to use. Effortless. And it should provide all that Google has to offer. Huffman notes that this is quite a task since Google must optimize its search for different mobile experiences and different user interfaces: Google’s own Android, Apple’s (AAPL) iPhone, etc. Some of these platforms require gestures–touch, swipe–others use a keypad. All must provide access to the Web and the mobile Web–sites that have been optimized for mobile devices. On the screen behind him, Huffman displays an example of Google search that displays desktop Web results and mobile Web results, the latter denoted by a red square.

Mobile search must also be easy. Huffman demos a shared desktop-mobile search for a flight number. Since he’s logged into his Google account, his search for “ba 284? SF-London on the desktop is immediately shared with the Google app on his mobile device. An unreleased feature, but it’s on its way. A quick look at local listings automatically delivered to devices on the basis on GPS/cell tower location, and then Huffman brings Mayer on stage.

Mayer talks a bit about universal search before moving on to Google’s “bento box” of search results. She talks about Google’s focus on the importance of presentation and its efforts to make search results more usable for the user. An example of this SearchWiki, a tool that allows users to annotate their searches, to “keep their train of thought,” says Mayer. We need to help our users find more and do more with it, she says, noting that the company is still working to address some longstanding user problems:

• Finding recent information
• Expressing that you want just one type of result
• Assessing which results are best
• Knowing what you’re looking for
• Expressing your searches in keywords

Mayer introduces Google Search Options, a feature that appends a search option panel to results, allowing users to “slice and dice” the results as they choose. A demo of the feature, in a search for “Hubble Telescope,” allows for search calibration by time, pages that include images, etc. Another search for “solar oven” is filtered down to specific genres–videos, discussion forums, reviews. Click on those links and that new search context is immediately displayed on the page.

Interestingly, the reviews feature uses something called “sentiment analysis” to extract sentiments from a review and present them in displayed snippets.

Search Options also includes a timeline feature that allows users to visualize results over time. And there’s something called “Wonder Wheel,” which presents a visual representation of a query surrounded by potential refinements (hence “Wonder Wheel”). Click on a refinement and results update automatically. Search Options should be going live now, says Mayer.

A bit of geometry monomania here today at Google Searchology. First the Wonder Wheel and now “Google Squared,” a sort of spreadsheet visualization of search being cooked up in Google Labs. Unstructured data pulled directly from search and organized according to the whim of the user. A search for “small dogs” pulls up a lists of–wonder of wonders–small dogs organized by size, weight, breed, etc. Click on an individual cell and you can change its source. Pretty slick. Still a work in progress, though. It should be available later this month, Mayer says during the Q&A.

Another new feature: Rich Snippets. A search for “drooling dog BBQ” returns your standard Google results along with a list of metadata–average user reviews, for example. A search for a GPS system includes an additional pointer to a recent CNET review of the unit in question. Rich Snippets is open API, incidentally.

Last up, an Android star map app that uses GPS to create a star map “local to your place on earth” and to your position. Move the phone and the map adjusts to your view–essentially the app transforms the device into map overlay for the sky. And how does this tie into search? Search for “Gemini” and a sort of pointer appears onscreen directing you to its location in the sky. And with that, Mayer wraps things up.

Pages, Apple’s word processing application, is also getting a bit of an update. Pages ’09 offers a full-screen view for the easily distracted writer, dynamic outlining, mail merge with Numbers–Apple’s spreadsheet program–and 40 new templates. Not the most exciting stuff, here, but decent additions nonetheless.

In Numbers, Apple (AAPL) has added some new categorization features–Table Categories, and, answering user requests, some 250 new formulas and functions. New charts, trend lines and other advance reporting options as well.

iWork is also migrating from the desktop to the cloud–in a sense. Via iWork.com, users can easily upload documents and share them with collaborators. Docs are viewable online. They can be downloaded. And collaborators can comment on them online. iWork.com is cross-platform (Mac and PC) and cross-browser. The online suite looks very much like the Mac-based suite.

iWork will run you $79, $49 if you purchase a new Mac. “This is the beginning of a new service,” Schiller noted, adding that it’s a beta and launches today, solo and as part of a $169 box set that includes iLife and Leopard.