not connecting to network

Thank you but my issue is not being able to connect to network so I can’t use any data to use WhatsApp or internet. 

Apologies ​@DrDebs62! I’d recommend performing a Manual Roam:

1. Open Settings.

2. Tap ‘Mobile Service’.

3. Tap ‘Network Selection’.

4. Turn off the ‘Automatic toggle’.

5. Choose a different network (Vodafone, EE or O2 - UK).

6. Wait for 1 minute.

7. Switch the automatic toggle back on.

And a Network Settings Reset:

1. Open ‘Settings’.

2. Tap ‘General’.

3. Tap ‘Transfer or Reset iPhone’.

4. Tap ‘Reset’.

5. Select ‘Reset Network Settings’.

6. Enter your passcode, then tap ‘Reset Network Settings’.

If neither help, I'd recommend a replacement SIM or eSIM:

• How do I get a replacement SIM or eSIM? F.A.Q.

Thanks.

Thank you that’s very helpful, will I need to then reset all my passwords? 

​@DrDebs62 -

No, your passwords will be okay. You will have to reconnect to any previous Wi-Fi networks, such as the one at your home. You’ll typically find the password on the back of the router. Thanks!