unlocked 4s software update
I want to update my software to 6.1 on my 4S because ever since it came out my signal is terrable. I went to T-Mobile and got a new sim card so that is fine.
Back story -- I updated my phone a few months back and Apple had to replace it because it was unable to hold charge after.
So now with my brand new phone and new sim card I can't maintain a signal for more than 20 minutes. The bars just jump around and drop calls. I've lived in the same place for 18 years its not my carrier.
What will happen if I update?
Is this some stupid way for Apple to make my perfectly good phone disfunctional?
Thoughts please -- this is super frustrating!
iPhone 4S