To turn message block on, from the home screen, tap Messages.
Tap and hold on the Desired number to block. Note: To access the Spam Filter through the Message Settings menu Tapthe More icon > Settings > Spam Filter > On/Off > Add to Spam numbers > Add Icon > Add Desired Number > Tap Save
Tap the Block number icon.
Read the prompt and tap OK. Note:Adding a number to the "Block list" does not block calls from being received. For instructions on blocking calls view the Block calls tutorial.
To remove numbers from the Spam list, tap and hold the Desired number to unblock.