WLAN connection but no internet vodafone?

Ph
1

I have a router from Vodafone / Huawei I have been connected to the router since today but I have no internet connection.

What could be the reason.

I have already restarted the router and the cell phone.

Also does not work on other devices (tablet).

Eg

I mean, you have to enter the number on the router into your mobile phone or tablet.