My phone is completely refusing to stop being in airplane mode. I've tried turning it off both in the settings and in the home menu, the home menu tells me it's off when it isn't and when I press it in the settings it just keeps saying it's disabling airplane mode... I sent it away to get fixed, and when I got it back 2 weeks later it worked for all of half an hour before the problem re-emerged. Is there anything I can do???