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Apologies if this is an elementary question.

I have called up the voicemail service and I listen to the first message; I'm then invited to press a key to save, delete, and so forth, but the screen has gone blank and there is no key to press. How do I recover the keyboard so that I can select an option?

A second problem then presented itself; that not only is there no key to select an option, there is no key to end the call either. The only way I could do this was to take the battery out of the back.

This can't be what the designer intended, but there is no guidance given any of the manuals I have been able to find.

Can anyone give me a pointer to an idiot's guide?

Edit: It is a Samsung Galaxy (can't say what model number), and it has no protective devices attached to it.

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Welcome to android.stackexchange.com. Can you specify the device you have (brand and model)? –  Zuul Jul 30 '12 at 13:35
    
"The only way I could do this was to take the battery out" - do you not even have a power button? –  w3d Jul 30 '12 at 13:42
    
Do you have a screen protector on your phone? –  w3d Jul 30 '12 at 13:51
    
@Zuul, thank you. I've added the make to the question. –  Brian Hooper Jul 30 '12 at 13:58
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It sounds like your screen simply turned off (possibly due to the proximity sensor) - pressing the power button typically turns it back on. –  eldarerathis Jul 30 '12 at 14:18
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1 Answer

up vote 3 down vote accepted

By what you describe, this is more likely to be related with the proximity sensor.

It is located at the top right corner of your screen, outside of the touch area.

If anything is blocking that sensor, the screen goes black. This happens to prevent the users face from touching anything on the screen during a call.

What works for me, is either using the home button or the power button to bring the screen back on.

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Righto. I do this, and the front screen comes up with all the usual app buttons, and the voicemail call burbling along in the background. So I guess I need to reconnect to that call somehow. I'll go away and try to work that one out. Thank you. –  Brian Hooper Jul 30 '12 at 14:31
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