My son purchased one and after we saw it my wife and I both purchased the 10+ with the trade in program. Now we have the devices and we are having problems. AT&T Visual Voice Mail does not work however a different program will after accessing the voice mail the first time. WIFI calling, HD Voice & VOLTE & Advanced Messaging is Not available I talked with AT&T and that said that I needed to contact Samsung and Samsung refeered back to AT&T . I finally talked with somone at AT&T that was able to look at my calling history and I am only connecting at 3G When I was considering getting the phones I asked was there a difference between the AT&T and the unlocked and they said no except that the phone came unlocked so i could use it on any carrier and no preloaded programs. I have had many unlocked phones in the past but this is unacceptable. If Samsung can't get AT&T to fix this then they need to replace our devices with the AT&T device so we can have proper service.
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