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I have an HTC phone.
I can no longer use message+ to send messages to three people in my contacts.
It states that I am no longer a participant in this conversation.
It just started today.
I can text if I go into contacts and send by Messages under threads.
When I return to mesaage+ it asks me to "Change SMS App?" If I say NO, then I get a banner across the message screen list. You cannot remove the banner to "set VZM as your default SMS.."
