[Q] Micromax Android One(A1) Hard Reset caused trouble topic

Hello All,

I have Micromax Android One(A1) AQ4501. There was an issue related to the internal memory so I did a master reset of the phone. The process was successfully completed but the trouble caused is after that.

1) After completing the reset, I restarted my phone and completed all my general setup steps.
2) After that, I opened Play Store and tried to update the Factory Apps like Google Search, Google Camera, Google KeyBoard, YouTube, etc. but it gave me an error saying "This app isn't compatible with your phone".
3) All these apps were updated and were functioning properly before I did the master reset.

Please help me solving this issue as the OTA for Lollipop is already out and I won't be getting it unless and until this issue is solved.

Note: THE AUTO UPDATE option is already ON.

PLEASE HELP ME FAST!! THANK YOU FOR THE SUPPORT IN ADVANCE!!

[Q] Problems caused by Google Play Store topic

So I'm having two pretty major problems with my phone.
1. The Music app doesn't work.
2. My screen goes blank during a call, and I cannot hang up

1. When i tap the Music icon, it "bumps," but nothing happens. If I use Firefly to check a song, and click the store link, it will open, and I can buy the song. But if I try to go to my media from there, the app crashes.
2. I'm assuming my prox sensor is locked or something? As soon as I begin a call, the screen goes black. The only way I can hang up is to hold the power button for 40s to force a shutdown, or if my headset is handy, I can switch it on and that will reactivate the screen.

I have contacted Amazon support about issue #1 and the first question the support girl asked was if I had installed any third-party apps through the Google Play Store. She said that she had seen this issue before and that was always the culprit.

Has anyone else experienced these issues? Any way to track down what app is causing them?