After hitting stores last Friday, it took just three days for consumers to snatch up 4 million iPhone 4S devices – an all-time mobile industry record. At the beginning of the week, Apple announced that 25 million people were already using its new operating system, iOS 5, and that more than 20 million had signed up for its iCloud service.

This week in mobile news, Apple’s new iPhone 4S delighted early adopters, while its iOS 5 received a mixed bag of reviews following the much-anticipated Wednesday launch. Meanwhile, Blackberry users across five continents fumed as a massive outage cut off access to email and Web services for several days. We’ll explore these stories, as well as interesting new industry data predicting Android’s ascendancy, in this week’s Fiksu Feed.

Recent news on TechCrunch and TUAW about Apple’s iOS 5 beta release 6 on Friday sent out a ripple across the app development world. Apple stated that, over time, it is going to be phasing out – “deprecating” – UDIDs, the unique identifiers that have long been used by developers as a consistent identifier of a mobile iOS device.