iPhone 5 data connection issue on at&t network

Recently I began noticing that my iPhone 5 doesn't have data coverage when leaving my home. I first noticed it one day when I was driving and needed Siri to get me turn by turn navigation guidance and she said no data connection.

I work from home so am connected to my WiFi sometimes days at a time without leaving. While at home I know I'm on LTE because my signal strength is 3 bars opposed to 5 bars on HSPA+. I know this because I tested it by turning WiFi off seeing 3 bars on LTE then turning LTE off and getting 5 bars. Lately I've been seeing 5 bars more frequently on my phone. When I turn WiFi off, I have no data connection.

I can only get data back by turning the phone off and back on. Turning Airplane mode off/on doesn't fix it, turning Cellular Data on/off doesn't fix it, and turning LTE on/off doesn't fix it.

Is it my iPhone 5 or is the problem with at&t's network? Any suggestions how to correct this problem? I'm tempted to turn WiFi off for a few days (on unlimited plan) to see what happens. FYI my WiFi network is from an AirPort Extreme if that matters.

Well that's somewhat comforting that its not just my phone but still sucks. Someone suggested a factory reset. Have you tried this at all out of curiosity?

Wow! I searched google for this and found nothing so posted myself and am surprised to see people having the same issues. Someone on another form I posted this to also has this problem.

Seeing how we all have the problem it means 1 of 2 things. We all either got phones from a bad batch (unlikely) or its at&t's network.

Ok, I just called at&t tech support to inform them that several of us are having this problem. They acknowledged this is an issue with the iPhone 5. She asked that I "Reset Network Settings" and keep an eye on it. She'll be following up with me on Friday evening to see if the issue has been corrected.

Y'all may want to try this as well to see what happens. Lets hope this works.

Well, I missed at&t's call yesterday but they left a voicemail saying they'd call me Monday. Everything had worked fine after the reset up until last night.

I now have full signal and when I turn wifi I have no signal again until I turn my iPhone 5 off then back on.

I wonder what at&t will do next to troubleshoot?

I'm in Green Bay, WI. AT&T called tonight and asked that try a few days with LTE turned off to see if the problem continues. She looked at her coverage map and said we have 4G but not LTE here. I said BS and told her I connect to LTE all the time.

Perhaps they haven't officially deployed LTE here yet as the press release said we'd have LTE by the end of the year. Maybe they are turning LTE on and off causing my problems?

In either case, she'll be calling me back on Thursday for an update. I'll keep everyone updated.

AT&T seems to think its not a hardware or network issue. She said it apples to be a software issue on the iPhone. She wants me to do random speed tests while on 4G too and keep screen shots so they can submit them to Apple as proof.