iPhone settings for My Number are important in tasks like sending mms on some cellular network providers etc.
These settings are usually your own number in international format, but may vary according to your cellular provider.
To change the settings for your iPhone My Number, follow this:
- Goto settings > Phone > My Number
- Enter your number in correct format
For example, the correct format for My Number for ufone starts with country code without 00 or + sign. Like: 923330000000 instead of 00923330000000