my alcatel idol 3, screen sometimes flashes on and off when i answer the phone; it is intermittent but the prevents screen use although the call can continue. On occasion, it seems to be a proximity sensor issue, but it can happen with the phone stationary and touching nothing. Help, if I cannot find a fix I will have to use Koodo's return exchange. Tried turning off wifi, bluetooth etc. no difference. Thought it has to be a setting but cannot figure out anything that would do it, let alone one that gets turned of and on.