When dealing with network or signal troubles, incorrect or misconfigured network settings on the iPhone are also a vital component to consider. As a result, double-check to make sure everything is set up correctly. To begin, go to your
iPhone's settings and ensure that cellular data is turned on. If you disable this option on your iPhone, you won't be able to access cellular services. As a result, double-check that it's switched on.
If you're having trouble using cellular data roaming services when traveling overseas, check your iPhone's Settings->
Cellular-> Cellular Data Options-> Data Roaming menu to see if the data roaming option is turned on. For