Thanks to macrumors.
I took the risk to buy one ATT with DEVICE ONLY option in store.
NO "successfully unlocked" message after plugging in.
http://www.s-url.ro/ shows locked
http://iphoneox.com/ shows unknown
However, after cut my t-mobile card, it worked.
I took the risk to buy one ATT with DEVICE ONLY option in store.
NO "successfully unlocked" message after plugging in.
http://www.s-url.ro/ shows locked
http://iphoneox.com/ shows unknown
However, after cut my t-mobile card, it worked.