Hi ​@Kritz1991, 

We’re sorry to hear about the issue you’re experiencing with your text messages.

Could you kindly please try the following steps: 

Go to Settings.
Tap Phone.
Tap My Number.
Use the delete button to remove the old number.
Use the keypad to enter the new number.
Tap Save.
1. Go to Settings
2. Messages
3. Turn off iMessage.
4. Go to General
5. Reset
6. Reset Network Settings.
7. Once the iPhone is open.
8. Go to Settings
9. Messages Turn ON iMessage.
10.This will recognize the new sim and have it verified.

Thanks,

Anneline

Thanks

Hi ​@Kritz1991 

Thank you for getting in touch with us. 

Please let us know should you need any assistance we will be happy to assist you.

Thank you,

Zandile 

The iD Mobile Team