So, I received my Turbo in the mail two days ago (had a Droid Maxx). In addition to my Verizon account, I have a Tmobile SIM for use when roaming internationally, since Tmo is dirt cheap. For grins, I decided to stick my Tmobile SIM in the Turbo when activating it for the first time. The good news is the Turbo worked like a champ on T-Mobile...fast 4G LTE and simultaneous voice (I'm in Dallas, Texas btw). The bad news is, when I swapped the Tmobile SIM for my Verizon SIM, I got voice only....NO VERIZON DATA WHATSOEVER...no 4g...3g...2g...nothing :-/ I spent an hour troubleshooting the lack of data on my Verizon SIM with Verizon Tech - did factory reset, reseated the SIM, nothing brought Verizon data back to my Verizon Droid Turbo. i even went to the Verizon store and tried a new SIM...no go either. Funny thing is the signal strength menu (more > mobile data > signal strength) sees both Verizon 1x and 4G, but the phone will not connect to Verizon 4G (it sees Verizon 4G for 5-10 seconds then goes away, but never registers), only Tmobile (with the T-Mobile SIM in of course). I am sharing my situation to help others who may be thinking about doing the same thing. If you plan on using your Turbo on Verizon, suggest first activating your device with the Verizon SIM. I am going to exchange the device tomorrow, unless anyone has an ideas they would like to share. They would be most welcome.