Actually I restored from the 520 backup. I will do as you suggest and perform a factory reset and see what happens. Thanks for your help. I will report back.
Yes, the APN settings that you outline have already been applied and I have no problem with accessing data but internet sharing does not work as described in my original post.
I can 100% confirm that you can send and receive pictures without a data booster as long as data is turned on on the device itself. I know this because I have a teenaged son who sends/receives pictures on the daily and does not have any active data boosters.
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