I have got iMessage and Facetime activated on my phone number in iOS 8.2.... Finally!
Thanks to the Apple Support representative, who helped me fix this annoying issue. I guess it was not so complex after all - just the same steps (which i did before) but now they were done in a particular order. She also checked the iMessage activation server status and there were no issues with it.
Here is what we did to solve the issue:
1. Signed out of Apple ID in both iMessage and Facetime.
2. Turned Off Message and Facetime.
3. Reset All Settings
4. Once back up, turned on Wifi.
5. Turned on iMessage (making sure MMS and SMS options were on).
iMessage got activated instantly on my phone number. Next, I signed in using my Apple ID and the email IDs were now activated on iMessage.
6. Turned on Facetime.
Facetime got activated instantly on my phone number. Next, I signed in using my Apple ID and the email IDs were now activated on Facetime.
All good!
Hope it helps others who are facing activation issues!
BTW: My iCloud ID and Apple ID are the same.