Nokia Lumia 521

This feature is not available on this phone.
Manage Messages
Add SMS service center number
To add or change the SMS service center number, follow these steps:
1. From the start screen, tap the Messaging tile.
2. Tap the More icon (...).
3. Tap settings.
4. Tap the SMS center number field.
5. Enter the desired number.
Note: The default number is +12063130004.
6. Tap save.
Delete picture messages (MMS)
To delete picture messages (MMS), follow these steps:
1. From the Start screen, tap the Messaging tile.
2. Perform one of the following actions:
o To delete an entire MMS conversation thread
1. From the 'threads' screen, touch and hold on the desired conversation thread.
2. Tap delete.
3. Tap delete again.
o To delete an individual MMS message