I have Gionee P4 phone, but IMO is not supported sometimes, it will not work properly if I uninstall and reinstall. When I register my UAE number, I just see the screen "Please wait a moment". What do I do for Installing IMO in my phone?
According to the requirements on the Play Store page, IMO application can be installed on Android 4.0 and up. This is, however, not enough sometimes because apps are usually configured to run on a certain CPU model, drivers, etc., so even if you have Android 4.0 you would still not have the possibility to install it.
There is a BETA version of the software. You can try to install it using the Google Play's page: https://play.google.com/store/apps/details?id=com.imo.android.imoimbeta