Originally Posted by Rodeoclown
Seemingly it will not let me install Agile Messenger either, as it says that it is not supported.
You need to app-unlock the 3100 before you can install Agile. Once you've done that, it works fine.
To app unlock it, use a registry editor to set the following registry keys (these are decimal values, use 1 and 40 if you're inputing them in hex):
HKLM\Security\Policies\Policies\00001001 = 1
HKLM\Security\Policies\Policies\00001005 = 64
For some reason people haven't had much success with other registry editors, so I would recommend Resco's, which I can vouch for through experience.
Smartphone History 9000i Communicator, Canary, Tanager, Mpx200, Typhoon, Alpine, Magician, Wizard, Universal, Hermes, Athena, Elf, N810, Niki, iPhone 3G, HTC Dream, iPhone 3GS, HTC Desire, iPhone 4, Galaxy S II, iPhone 4S, Galaxy Note, Galaxy S3, Galaxy Note 2, iPhone 5, HTC One
Tablet History Q1 Ultra, Dell Streak, iPad, Advent Vega, Acer A500, iPad 2, Acer A100, Arnova 7c G2, Tab 2 10.1, Nexus 7, Nexus 10