I am using Micromax A89 with

ICS 4.0.4
512 MB RAM
Screen 4.0 Inch

I am facing this problem since beginning. But it was solved automatically. Now again it happens when I dial a call or receive a call my mobile's screen goes off and does not come back. I must have to use power button to end the call (I set "Power button end call" checkbox from settings).

I think it's a proximity sensor problem but not sure?

But when I restart my mobile then it works for 1 or 2 calls but after it again it creates this issue.

Any help would heartily be appreciated.

  • Did you try wiping the proximity sensor area?
    – samnaction
    Jun 6, 2014 at 11:59
  • @sameer, yes I tried that too but no luck. Jun 6, 2014 at 12:02
  • What about wiping cache and delvik cache? There is post in xda about it
    – samnaction
    Jun 6, 2014 at 12:12
  • You can also try this app if you are root play.google.com/store/apps/…
    – samnaction
    Jun 6, 2014 at 12:13
  • @sameer, I didn't have root my device. But what about wiping cache and delvik cache? Without rooting, how can I do that? And will it hurt my device? Jun 6, 2014 at 12:48

5 Answers 5


I faced the same problem but I found a simple and perfectly working solution:

  1. Dial *#*#7769#*#* (Proximity sensor calibrator)
  2. You will see 2 options Start and Exit
  3. Click on Start.
  4. Move your finger over the proximity sensor 3-4 times and try to change the value on screen.
  5. If values are changing after 3-4 tries then your problem is solved.

Thanks to nighil g


If you want to learn whether or not it is caused by proximity sensor you can download this app and see if your proximity sensor is constantly sensing something that it shouldn't. If that is the case, I went through the very same problem and solved it. When I was searching the internet for a solution, someone simply suggested me to

Take a little pipe and blow into the speaker of the phone strongly a few times.

And it worked. I had to do it a few more times later on but it is solved permanently. Give it a try and I believe it'll work out.


The question is too general and there aren't enough details to suggest a solution, it seems more likely to be a hardware problem.

Get your phone checked from a Micromax Service Centre.

PS : If you use a screen guard, it might be partially blocking the proximity sensor.


Try this: turn off the phone, then press volume up + volume down and power buttons for a while. It will show 2 options, recovery mode and factory mode. Select factory mode and there you do all tests and all your problems will be solved.

  • What do I have to do with those shown options? I cannot reset my mobile because I did it so many times in past and every time it will empty my mobile. So what options are there? Dec 8, 2014 at 12:01

You can try Xposed Installer app and can download proximity disabler to disable your proximity sensor.. :-)

  • 4
    Could you link this? Nov 19, 2015 at 7:37

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