A: It is legal to use for unlocking your own phones or with customer permission. IMEI changing is illegal in many countries unless repairing the original IMEI.
A: Run the software as Administrator and close Samsung Kies/Smart Switch. z3x mst tool v2614 upd
No software is perfect. The community has reported the following bugs in this specific version: A: It is legal to use for unlocking
The following models have been added to the database in v2614: z3x mst tool v2614 upd