Microsoft is reportedly buying and testing as many microSD cards as it can find, in an effort to provide Windows Phone 7 owners with a list of trusted models for use in their devices. SanDisk, meanwhile, has suddenly removed the list of five Samsung Focus-compatible cards that had recently graced its site.
Tech Radar writes that a Windows Phone team member acknowledged the compatibility testing, which it was apparently unable to perform prior to launch due to the lack of time and resources. Since most phones, save for the Samsung Focus, do not have user-accessible cards in the first place, it probably seemed like a minor issue at the time — but with owners reporting problems replacing built-in cards and the resulting publicity, this has clearly become a matter of some urgency for the mobile division.
Samsung and AT&T had been telling users to wait on WP7-certified cards for some time, despite lack of confirmation from Microsoft and availability of said products at launch. Apparently the cards which manufacturers buy in bulk have been cleared as having the proper read/write speeds and error rates, but consumers cannot simply choose based on class rating alone: thus the supposedly frenzied attempt to test each and every card on the market. We’re assuming that until Microsoft publishes its list, no card is 100% safe.