for all iphone 4s users inorder to use iMessage properly please do the following:
For MTC users
APN: mms.mic2.com.lb
Username: mic2
URL:
http://mms.mic2.com.lb/
For ALFA users
APN: mms.mic1.com.lb
Username: mic1
URL:
http://mms.mic1.com.lb/
these setting should be put in the MMS settings.... Open settings then General then network then cellular data that is found over the data barrier switch