How To Fix NOT REGISTERED ON NETWORK In Samsung or Android Phones
Method 1. Updating Latest Software
This method is common for all methods, so do not ignore it, may be solve your problem with this one easy method.
First of all make sure that your phone is fully charged otherwise full charge your phone.
Now open Settings.
Find the Software Update (Scroll down to the bottom).
Now Select Software Update and wait for Reboot and complete process.
Method 2. Using Manual Network Mode
Go to Settings.
Then go to Wireless and networks.
Then select Mobile Networks, it also may be in more settings.
After restarting, follow the above steps again, except step 4 and now tap Networks operators. We are going to set it to manual network searching mode.
After completion of searching, select your Network Operator (Like Airtel,Vodafone, Idea…etc.)
That’s it, problem solved.
Method 3. Rooting and Patching
This method needs to root android phones to solve not registered on network problem for Samsung Galaxy and other Android devices Devices.