The crapberry storm was the worst phone I have ever had hands down, reception was just pitiful, besides everything else about it.
Boy did that bring back really bad memories.
As for my Iphone 6+ (this is my 3rd replacement, last one was I think november) and it is great, no random resprings at all and I have loaded all updates within a day or release, so if you are then wipe and set up as a new phone and if it still happens get that iphone replaced and keep doing so until you get one that works, I know 4 of us that have no problems with our 6+'s, besides the 6+ being weak in reception on verizon. I was the only one that got respring issues and now its gone with the 3rd replacement for months now.