iOS 6.0.1: Loses LTE/4G when off Wi-Fi - no internet

I don't have a solution yet, but just wanted to let you know that you're not crazy. My iPhone 5 has the same issue since the upgrade to 6.0.1.

I have spotty wifi service in my house, so when my wifi gets hung, I disable it to finish my download via LTE, but I have no data signal. It shows full bars and AT&T, but the words LTE or 4G are missing. It's just blank. I too tried toggling airplane mode and cell data. The only workaround is to power cycle the phone. I did not have this problem with 6.0.

Not that it matters, but I'm also in Chicago on AT&T. This is most definitely a bug that Apple needs to address in the next release.

Not crazy - I'm experiencing the same issue.

LTE was great for me in my area on Rogers until 6.0.1 - now it's annoying.

Also, I'm going to have to troubleshoot apps - because it keeps opening GPS/Location services and keeping it open for hours until the battery drains out. It's super annoying.

Once I turn location services off, things are great. For such a huge battery supposedly - it gets worse life than my 3 year old iPhone 4. In fact, in my opinion, which is not clinically backed by me writing down timing - it's the worst iPhone I've had for runtime. And I've had a 3G/3GS/4 (No 4S) and now a 5.

I really was not impressed by the lack of revision betas on 6 and now it was a long wait for 6.0.1 - I'd like to see a bunch of work on the OS instead of a million new products... they're as bad as my work lately with awesome new products that don't work as well on release as I'd like. 😉

My LTE is down too... Tried restoring - no luck. Tried installing a beta of 6.1 (i'm a dev) - also no luck. Sad face

Hello, all I installed the update and have no signal it will spur of the moment come and go and it is annoyin not being able to call or text this update cripled my phone im on sprint , I did OTA update , whats the fix?

Solution found! http://forums.macrumors.com/showthread.php?t=1451331

*it's worth noting that this method worked for me on the beta version of iOS 6.1... It *should* work fine for 6.0.1 - but I haven't been able to test.

I"m having this exact problem. I have Iphone 4s.

Both my wife and I are experiencing same symptoms as you after update . And, also have to reboot to get back on 4G or LTE... We also live in Chicago.

So I spoke too soon... Fido in Canada released a carrier update yesterday that broke LTE again :/

I am in Austin, Texas, I'm on AT&T and am having the same experience with LTE on 6.0.1 (iPhone 5). I just updated last week and all data services stopped working when not on WiFi. LTE was previously working great on 6.0, but not since I upgraded to 6.0.1. I can make and receive calls normally. I can send regular text messages, but not iMessages. Also, the Internet does not work, nor does e-mail. However, the instant that I'm back on a WiFi network, everything comes back online and new mail begins to download.

Perhaps a Genius Bar visit is in my future?

Does a reboot fix it? I've noticed this a few times as well myself. It looks like everyhting is ok, I have an LTE icon and everything, but nothing works. A reboot fixes things. Very similiar to my wifi probs. Just started on 6.0.1

Sorry, I should have mentioned that. No, regretably a reboot does not seem to make a difference. That was my first thought. I suppose I could try a "hard" reboot (Press and hold both the home key and power key).

Are you using and Onavo apps? If so, uninstall the apps and mobile profiles it installs and reboot.

I'm in Milwaukee and I'm having this exact issue myself. Power cycling the phone is the only way to regain cellular connecitivity even though I have 5 bars of signal. I know lots of other people that have th 4S & 5 none of whom are experiencing this issue so they think I'm crazy.