Why there is no network in my phone?

Oh, that is so annoying when it happens. First, you should check your Airplane Mode. Sometimes I turn it on by mistake. Also, think about where you are. Are you deep inside a building or in a basement? The signal can be bad there.

The easiest fix is to restart your phone. Just turn it off and back on. This works for me a lot. You can also try taking your SIM card out and putting it back in. If nothing helps, maybe your service provider is having an outage. You might need to call them.