Information about downloading IBM Cognos Mobile 10.2.1 FP3 is available on the Downloading IBM Cognos Mobile 10.2.1 FP3 page.
Cognos Mobile 10.2.1 FP3 contains product corrections to the iOS native app and the Android native app only. To better take advantage of the iOS7 capabilities, we are planning to drop support for iOS5 in the first quarter of 2014. Users with iPad 1s will no longer be able to upgrade the app to the latest version. This statement was first announced in Cognos BI 10.2.1.
The fix list for this fix pack can be found here.