So for the first week, my Sprint iPhone was working perfectly. No issues, great reception and full bars at home. Now for the last 5 days, our phones are constantly switching between "Sprint" and "Extended." This is so frustrating. Sprint bars rarely go above 2 bars and we drop calls all the time! We can hardly send text messages and 3g doesn't even work. Is there any way to force the iphone to roam only. When we're in "Extended" mode, the phone works great. Called sprint to explain the issue and they're sending a mini-cell tower Airave to us for free but that can't get here soon enough.