The first step to trouble-shooting almost any problem with an electronicdevice is to turn the device off, wait a few seconds and then turn it back onagain.
This operation can generally solve the following issues:
phone will not make or receive call
phone is frozen
phone doesn’t have internet access
If your phone has lost internet connectivity, try the following:
First, check to see if the Mobile data checkmark is on (often times the mobile data gets turned off by mistake.)
If the Mobile data is on, then go to mobile networks and check the APN (Access Point Names). Each company uses a specific language in order to get access to the internet. For example, T Mobile uses the following configuration: fast.t-mobile.com. Check to make sure yours is correct.