I'm hoping someone on here can help me figure out what's wrong with my Lumia 521 (MetroPCS). My phone was at about 60% at the time I plugged it in, then suddenly my battery power was completely zapped, the phone turned off, & none of the chargers we have that did work before will work now. I know it's not the charger, because the chargers work just fine with other phones. Depending on which charger I plug in, the phone buzzes & Nokia comes up on the screen, but that's as far as it gets before starting all over again in an endless loop, or instead of looping it shows the Nokia screen & them the battery symbol comes up & starts flashing. At no point does it ever get to a point that the blue Windows or white Metro PCS screens ever show, or gets to a point that I can try to reset it. I don't know if the problem is the phone or the battery, but I do know the contacts are clean & the battery is not loose. The carrier refers me to the Nokia site & the Nokia site refers me back to the carrier, yet another endless loop. This is so frustrating, especially since I just bought the phone 3 months ago. Any help anyone could give me would be greatly appreciated. Thanks.