Easy Answer, Sprint. 1. Nextel is being taken down. But even if it wasn't... Sprint has 10x better internet, & phones. Read entire answer

If your on a newer plan you can roam anywhere in the US at no cost. Read entire answer

I suggest restarting your phone, if it doesn't work try updating the data profile. Its a network issue, its having trouble communicating with your device. Read entire answer

Either the phone is off or she has both of those numbers set "send straight to voicemail". Read entire answer

Your wanting to wipe your phone? Just do a factory reset. Its under settings and privacy or security on most phonea. Read entire answer

I have never seen a case where minutes used was incorrect. What plan are you on? Also, sending photos or receiving them will use internet access. My advice would be to completely restrict the internet. You can do so yourself ny logging... Read entire answer

I don't quite understand your question. What exactly are you attempting and what is the issue? Read entire answer

Just call customer care and they can check Read entire answer

Then you need to login to your www.sprint.com account and go into the reset voicemail password :) Read entire answer

Yes you can combine them, its actually called a "Transfer of Liability". It's quite possible and happens all the time. One of you need to choose who account the other number will go to, then bring in both of your bodies and... Read entire answer