Microsoft reportedly sold just 40,000 Windows Phone 7 phones in its opening day on sale Monday, dwarfed by Apple's 600,000 pre-orders for the iPhone 4 on its first day and Google's boost that it is activating more than 200,000 Android phones per day.

The report by TheStreet.com citing "a market research source who tracks phone sales" dovetails with new research from the IHL Group that shows relatively little interest among current smartphone users in Windows Phone 7. The IHL study announced this week found that more than 56 percent of current smartphone users are seriously considering an Apple iPhone and 44 percent an Android device for their next smartphone, while only 24 percent are considering a BlackBerry and a paltry 10 percent gave Microsoft's Windows Phone 7 any serious consideration. The study is based on a survey of 570 consumers and 66 retailers, the research firm said.

All four national US wireless carriers announced last week that they'll sell Samsung 's  Android-based tablet this fall, and Samsung disclosed a series of media partnerships aimed at making its Galaxy Tab a viable competitor to Apple's iPad.

Verizon Wireless, AT&T Mobility, Sprint Nextel and T-Mobile in separate announcements said they will offer the 7-inch tablet based on the latest release of Google's Android mobile OS, though none offered details on pricing or specific release dates. Verizon said it will launch the tablet in the "coming weeks," AT&T in the "coming months," Sprint by "this fall," and T-Mobile said "for the holiday season." At a press conference in New York, Samsung said it would launch a Media Hub services with partners including MTV, NBC, Paramount and Universal Home Entertainment, designed to be competitive with Apple's recently revamped Apple TV service.

Wireless also-ran T-Mobile is risking some headline jabs by flat-out giving away its phones on June 19, while AT&T and Apple can't keep up with the flood of iPhone 4 pre-orders coming their way.

Starting at 8 a.m., ostensibly in celebration of Father's Day, T-Mobile will give away any phone in its store to anyone who signs up for a two-year calling plan with more than one person or adds a line to an existing plan. Proof that a father will be using said phone is not required.

T-Mobile USA has dropped overage charges on its $40 5-GB monthly mobile data plan, essentially converting it to an unlimited plan, but said it "may" throttle users' speeds if they exceed 5 GB in a given month.

Previously, T-Mobile charged $0.20 per MB of data over the monthly 5-GB limit on its most generous webConnect plan. But now, data-hogging users who eclipse 5 GB in a given month may see transmission data speeds slowed, though the carrier has not said by how much. T-Mobile also cut the overage on its $24.99 200-MB monthly data plan from $0.20 to $0.10 per MB. The nation's No. 4 carrier first introduced the webConnect data plans last month.

Almost one month after Google began directly selling the HTC Nexus One smartphone to consumers -- and started getting heat for everything from shoddy customer service to a long list of bugs -- it has begun to make some healthy adjustments.

On Jan. 13, in the face of mounting criticism, Google told the media that the company was taking a flexible approach and was ready to "make changes to our processes and tools, as necessary, for an optimal customer support experience."

Google isn't a stranger to bad publicity. Privacy advocates aren't exactly the biggest fans of the company. And CEO Eric Schmidt didn't win over many people with his infamous statement about online privacy last month: "If you have something that you don't want anyone to know, maybe you shouldn't be doing it in the first place." Those recent Gmail outages stung too.

But the Nexus One debacle -- combined with investor concerns that Google's potential pullout of China could negatively affect its future growth -- could make this one of the search powerhouse's worst weeks ever.