Storage

Delete old messages: Checkmark to allow the phone to delete older messages in a thread when the Text message limit or Multimedia message limit is reached. No checkmark keeps all messages.

Text message limit: Tap to set the number of text messages to save per thread.

Multimedia message limit: Tap to set the number of multimedia messages to save per thread.

Attachment storage: Sets where to store your attachments. Choose Internal storage or SD card.

Signature: Checkmark to automatically add a signature that you set.

Callback number: Checkmark to automatically enter a callback number. The default is the phone number, but you can change it to another number.