Allow messages from contacts in your contact list or allowed sender list
1.
On the home screen or in a folder, click the Options icon.
2.
Click Security > Firewall.
3.
In the General section, if the Enable checkbox isn't selected, select it.
4.
In the Block Incoming Messages section, select one or more message types.
5.
Select the Contacts checkbox or Specific Addresses, Phone Numbers, or PINs checkbox.
6.
Press the
key > Save.