Will my phone work on the new 5G network?

Of course! We’ve upgraded our network to one of America’s largest 4G LTE/5G networks, but that doesn’t mean 4G LTE is gone. Your new SIM Card will connect to whichever network is most compatible based on your current phone model

My phone keeps turning ON and OFF. How can I fix this?

If your phone is turning on and off, you may need to reboot it How to reboot an  Android phone: Hold the power button on your phone to turn it off. Once off, hold down the power and the volume