My family recently switched from Verizon to T-Mobile and I picked up a refurbished iPhone 5. The other day I was at a crowded festival and wasn't able to send texts. However my sister's Android on T-Mobile did not have this problem. Is there any known history of iPhones/iPhone 5 having poorer reception than Androids on the same network? Any remedies? This is concerning because I'm going to be at another large crowded festival this weekend where I will "need" service.