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I have AT&T in the U.S., which qualifies as a large provider. For SMS message I have 2 choices - pay $20/month or $0.02 per message. Both choices stink. For now, I use Google Voice, but I do have reliability issues for messages coming and going (most like due to data connection, just like with twitter). No one should have to pay that much just for text messages.
Oops, that was actually supposed to be $.20 (20 cents) a message - a crazy price for a text message.