Is it true getting Unlimited Text Msg would also extend free M2M to out-of-network Mobiles??
I just read another post that answered someone's problem. The answer seems to imply that if I add Unlimited Text to my (grandfathered) Family Plan 300 with free M2M (within AT&T), that I could also Talk to other mobiles, free.
Since I make long calls to my son, who has another network, this would be worth doing, if true; rather than paying the 40 cents per minute overage charges.... ?????? Is this true?