Which carrier is better? Sprint or T-Mobile?

I live in the LA County in California, and the internet speeds I get often slow down. Sometimes I don't even receive 3G data on my iPhone 4S. I was thinking about switching to T-Mobile, because I hear some people saying the coverage is better and the value is good. Any thoughts?

Calls on Iphone not working?

The sound works, as I can listen to music and talk on speaker, but when I try to make a normal call I can't hear the other person?

I Didn't Get An Amber Alert?

I Have An Iphone 4 Running Ios 6.1.3. && I Look For The Government Alert On My Settings To Turn On The Amber Alert & I Don't Have It. Niether The Toggle To Turn On The Alert On Notifications.

My IPhone 4S Won't connect to my Home Wi-Fi?

I have an IPhone 4S and I recently went out of town for a couple of days using 4g the whole time. When I came back I turned the Wi-Fi setting on my phone on and it was trying to connect to the network but all that happens is I get the spinning loading wheel In front of the network name. I have tried hitting forget the network and reseting network settings but none of it works. I'm positive I've entered the correct password. There's not a problem with the router because all the other cell phones in the house all work just fine on the network.

How to change the apple ID on my iphone?

I changed it under store, but when I can't change it under icloud.
The phone was a gift from my boyfriend at the time, and it has his email.

Added (1). What would happen if I hit 'delete account' Would it just delete his icloud account off my phone, or would it mess up his account?

Do I need to get the battery on my iPhone 4S replaced?

My phone completely ran out of battery and an hour later I charged it but its not charging! Do I need to get the battery replaced? If so do I go to my phone company (Verizon wireless ) or do I go to an Apple store?