If I plan to use this phone on a tmobile mvno can I just buy it and walk out or do I have to buy a tmobile sim card to activate it first?
The tmobile version.Which one?
A T-Mobile enabled phone...or the unlocked version available now?
so basically we have still no idea when the ATT version will come out, right ?
Also we dont know if the t-mobile version will be compatible to the ATT sim card, right ?
If I plan to use this phone on a tmobile mvno can I just buy it and walk out or do I have to buy a tmobile sim card to activate it first?
I think you can assume that the t-mobile version will be SIM-locked to t-mobile at time of purchase. If you manage to get an unlock code, then it should work fine with ATT.
Exactly -- since I have never done that... do you can do some "buyout unlock code" ? or do you have to wait for x-months to get it ?!
PS: I also noticed a support page for HTC One M8.
T-Mobile US has added a Lumia 640 support page:
https://support.t-mobile.com/community/phones-tablets-devices/windows/microsoft-lumia-640
PS: I also noticed a support page for HTC One M8.
Why would that be unusual? They've already sold the phone to people, so I'm assuming it's supported. Or was there not one there before?