Phone goes into sleep mode while on a call but I can't wake up!

[exsheeple]

When I'm on the phone, the phone goes into sleep mode, as it should when you out it to your head but I can't get to to allow the phone to show the dial pad, hold, etc. It stays black.

[theomer]

Check your case / screen protector. Do they leave space for the light sensors?

Also if you replaced your glass/digitizer ever, the replacement may or may not have left that space as well.

[exsheeple]

I have no screen protector or case and the phone has all original parts

[z3r01]

That sounds like a mobile substrate problem to me. I had this happen to me and it was because it had something wrong with mobile substrate

[exsheeple]

Any ideas on what to tweak in that area? That's in the sb settings right?

[Simon]

Mobile Substrate is used by a lot of tweaks and apps in cydia. Is there anything you installed recently before this started to happen?

[exsheeple]

No. What I did was jb the phone again and as I added the cydia apps, tested the phone and it seemed to do it before jb. I'm using 4.0.1

[Simon]

It may be a hardware issue with your proximity sensor then. Try a restore and set it up as new to see if it still does it.

[exsheeple]

If i setup as new and then restore from a old backup, can it pick up the same issue?

[Simon]

It depends when that issue started.

[exsheeple]

I have the iPhone 4, JB, when I'm on a call or texting sometimes if my hand goes over the sensor or I put my phone to my head making a call, the screen goes black and the only way I can get the screen back up is to press the power button then press the home. Any ideas

[exsheeple]

Brand new phone. Case not blocking anything, have one of those otterboxes