My phone can't write text messages (they are converted straight to MMS and when i convert it to text it still dosen't work), nobody can receive them, i can't reply to anything (it keeps expecting me to record a message to send when you press reply). Sony Erricsson W995

Problems sending or receiving SMS may be caused by no or incorrect SMS settings. To set up your phone to use SMS, you need a message centre number, which is provided by your network operator. This is often set up automatically when inserting a new SIM card to a phone. Whiteout the message centre number, you are not able to send or receive SMS.

To edit the service centre number:

1. Select Menu > Settings > Connectivity >Message settings.
2. Select Text message.
3. Highlight Service centre and select Edit.
4. Highlight a service centre number and selectOptions > Edit > Continue.
5. Enter the service centre number and selectSave > Yes.
6. Highlight the service centre number and selectSelect to use the defined service centre number.

To add a service centre number provided by your network operator:

1. Select Menu > Settings > Connectivity >Message settings.
2. Select Text message.
3. Highlight Service centre and select Edit.
4. Select Add to add a new service centre number.
5. Enter the service centre number and selectSave.
6. Highlight the service centre number and selectSelect to use the defined service centre number.