Re: Sending/Recieving MMS
What happens when you suppose to recive MMS? you got SMS informing you about that (usally happens phone is not configured right, network simply consider that your phone does not support it... at least this happens in my local Polish carries :p)? YOo recive it just can't open it? or you not getting any signs of getting it?
4G should not effect as your phone should also support 3G and 2G for fallback and roaming reasons, in general they operate like extensions of each other not to mention LTE does not support calls (yet?) so 3G handle it.