Thanks, that was the trick. I use the smallest data plan available and never use mobile data except for emergencies and leave it turned off. As long as a sender is using MMS to send, I just get the download button. This even includes senders who use decorative signatures, wallpapers, etc which defaults their message to sending MMS and that disables my phone from receiving. Having them go back to pure text allows me to receive everything and use my unlimited texting option. Unfortunately it isn't controllable from the receiver;s phone, only the senders phone. If it leaves the senders phone using MMS, the receiver cannot accept the message without accepting it MMS and that requires your mobile data to be on.