I am not sure when this all happened but the former service called SkyDeck was renamed to Mr. Number. The old service was a sort of social phone book with some interesting features that backed up calls and texts to their website but it seems like the add on caller ID feature garnered the most users. The feature is VERY cool but its also a bit scary and turned out to be more popular than anything else SkyDeck had to offer with over 250,000 users. For that reason SkyDeck was rebranded to Mr. Number.
What it does is it provides you with caller ID for almost 70% of the numbers out there for free using crowd sourcing. When you get calls and texts from numbers that you don’t recognize, Mr. Number members tell you who it is. They give you free caller ID in return for letting them check caller ID results for other members from your address book. This works especially well on GSM 3G networks like AT&T and T-Mobile that can do simultaneous voice and data so it can grab the caller ID while the phone is ringing. The way they do this is by combing your contact list .
They have also used the caller ID service to help identify spam callers like telemarketers. Since they don’t have much info to go on they have been studying the calling patterns of telemarketers, debt collectors, and other problem callers to identify them. We can now identify a number as suspicious based on calls to just a handful of users. The interesting part is that they really had it easy developing for the BlackBerry platform since it already had the API calls in OS 5.0 to integrate caller ID. I think this was because Verizon has their own caller ID app for BlackBerry.