I just switched to ting and my family members who got iphone 4s's are having some pretty severe voice quality issues. There is a little sprint coverage where they work, but it's so weak that it is unusable. I see that it's pretty easy to force roaming on android devices, but the only way I can see to do it on an iphone is to make everything roaming, which I'm assuming would break data and texts for them (am I wrong?) here's the method I'm referring to: http://forum.iphone-developers.com/iphone-hacking-jailbreaking-modding/3398-force-roam-sprint-iphone-verizon-jailbreak-required-helps-data-speed-issue.html
Is there any way to force the iphone to roam for voice only?
edit: or, ideally, is there a way just to make roaming activate when the network sprint strength just isn't strong enough to actually carry a call? I doubt that's possible since I haven't seen anything about it anywhere, but I figure can't hurt to ask.