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Root [International] Trouble making calls/sending texts :(


Nov 11, 2014
I've had this problem for a while now, and it's stumped all the cellphone experts I've gone to. When I'm inside buildings or sometimes in moving vehicles, I sometimes won't be able to send calls or receive texts. I will have four bars, the signal strength will be fine, but I'll still have the same problem. Sometimes it does allow me to call/text, but the person on the other end says that I'm breaking up.
I bought it rooted from Craigslist. Under software number is Android Revolution HD 12.2 by mike1986. It runs Android 4.2.2.
It's a great phone otherwise, so I really don't want to have to replace it entirely. What can I to deal with this problem?

PS - I'm a bit of a noob, so please break everything down into simple terms!

Thanks in advance


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