« Last post by Nodial on October 12, 2018, 02:01:38 PM »
I'm answering you below:
a) Yes that's fine, anyway keep in mind that you have to continue paying for the device even if you unlock it because otherwise the original carrier will blacklist it for fraud.
Blacklisted means it cannot be used anymore, they IMEI is blocked, it could happens because of the above explanation or because someone reported such IMEI as stolen.
The above service will unlock the device globally, both domestic and international.
b) The J3 Emerge has a new protection, if it has been updated over a certain version our app won't be able to unlock it. Just install our app on such device, our app will notify you that's not supported if that's the case, otherwise you will be able to unlock it (root is required).