I've been using my lumia 635 for a while now, I usually make long calls. However every time I cross the 59:00 minutes mark the call is disconnected, i live in india and use IDEA CELLULAR as my service provider. I tried and tested this out dozens of times. The call is always dropped after 59 minutes. Anyone else suffering from this issue? Is this a confirmed bug? I've tried doing a soft reset by holding the volume down and power button till it restarts, no results.