Flashing screen on incoming call. How to remove?

Question

iPhone

Good% time of day%, habravchane!
Recently I bought myself an apple miracle, namely the iPhone 4S 16 Gb
The device came to me already reflashed, unlocked, and pumped with several programs and Cydia. I haven't touched anything, as they say.
Everything would be fine, but the other day I noticed one thing that annoys me very much - when a call comes in, the screen starts flashing white, as if pulsing. This concert stops after pressing the volume button (any).
Tell me, please, have you met such a problem, or is it not a problem at all, but such a feature?
And how to deal with it?
Here is the info on the tube:
Version 5.1.1 (9V206)
Model MD235FD
UPD:
Comrade fstsuggested that the problem is due to the AnyRing application, from Cydia. Removing the latter solved the problem. Thank you!

Answer 1

AnyRing has a similar feature, which can be installed from Cydia.

Answer 2

Use used phone without resetting it to the factory state, it's like eating in a restaurant from a plate that has not been washed after a previous visitor.
Reset everything to zero and do it from scratch, no one knows what else might be there, including Trojans, for example. I know firsthand, at the request of a friend, I “finished” an iPhone for his wife, i.e. from the store he came first to me, and only then to her. At the same time, it was impossible to see through cydia or even as a Trojan just like that.
So it goes.

Answer 3

Look in the Accessibility settings, there may be a screen call indication for the visually impaired. If this is not the case, then someone installed something from Cydia - look at the installed packages.

Answer 4

You can use unlimtones from cydia, it allows you to add any melodies from music to ringtones.