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I’ve got an iPhone 6 that shows 4G up top but will not connect to cellular data. Phone calls can be made, but cannot access the internet. If connected to wifi, internet can be accessed. Background info: Screen replacement previously done on this phone. Phone has been working fine for few months. This issue occurred right around the same time that plan was changed with ATT. The phone used to show LTE but now shows 4G up top. AT&T says it is nothing on their end. Any ideas??

Sounds like a provisioning problem. Go to Settings > General > Reset > tap “Reset Network Settings”. The phone will automatically restart. Let me know if this solves your issue.

I recently had a trip to Japan for which I switched my sims so I didn’t get charged for using my phone abroad. When I returned to the US, I switched my sims back and I started to have this issue. While I was troubleshooting with the general settings I noticed that the Japanese sim had created a configuration profile for me. Once I deleted it everything went back to normal. Its missing on my phone now, but it should be under: Settings>General>Configuration Profile>Delete Profile Other Instructions to delete configuration profile from apple are in the link below: https://support.apple.com/en-us/HT205347 Hope this helps!

I just had a similar issue with my iPhone 6, searching and no service most of the time and if I get a signal eventually it only shows 3G (it should be 4G) and there is no data coming trough (works fine on WiFi). What I did is I replaced QFE1100 (the signal power ic) which was corroded due to water damage and now my phone works fine, I have 4G and I have SIM data. Hope this helps someone :)

im having this exact same problem with a 6 plus! if you find out whats wrong with it let me know please!

I m also facing similar- ditto issue, my phone works only when i switch off and re switch on again. As i notice, this mainly happens when I connect to one WIFI …when I come out od wifi there are no more wifi signals and mobile data fails to pick up. Plus, my wifi mobile data switches ON itself automatically. this might be another Apple upgrade issue. Pl help. My network says no error on their behalf. Plus my sim a’int old enough. I dunno.

I also have a similar problem. I can see the LTE sign on top, but i have no internet. However, the only app that can access the internet, is the safari. My phone works fine with WiFi. This problem started very sudden. I have tried reseting the device. I have also reseted the network settings. But still the same problem. Any suggestions?

What a great advise to remove the extra profile that will definitely solved your network issue. Thx

Hi guys, I have similar problem. My cellular data works for some time and then randomly stops working for a few minutes. Then it works again. The signal is shown as normal and calling works normally. It’s just that the internet has speed of 0 mbit/s, nothing loads. My iPhone is 6s Plus. I thought it’s the operator, but I experienced the same thing abroad with another SIM card. I tried reinstalling iOS and resetting network settings. Is there something I can do?