iPhone 6 shows 4G but no cellular data
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.
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.
Is this a good question?