One of these will reconnect you
How to Fix Mobile Data Not Working on Android! [Android Update]
When you’re on the go and don’t have access to wifi, your only option is to go online using your phone’s mobile data. Sometimes even mobile data stops working and you’re completely cut off from the internet.
There are many reasons why your Android phone’s mobile data is not working. Your phone may have a software issue, your carrier may have an internet connection problem, or your network settings may be wrong.
Anyway, there are several ways to fix the problem and get back online.