a687 at&t unlock
today success unlock with z3x samsung a687
method use micro usb cable install emp driver
attach usb cable in pc click on unlock sp
press 1+0 and insert cable install driver
after box detect mobile and read code like this here is my log
Count supported models - 223
Press 1 + 0 and connect phone by cable
Waiting for SE USB Device... OK
Detected:\\?\usb#vid_0bdb&pid_100e#6&10174afe&0&2# {a5dcbf10-6530-11d2-901f-00c04fb951ed}
Opening Port... OK
Flash ID
[You must be registered and logged in to see this image.]900
Protocol:0401
Sending Loader 1... OK
Sending Loader 2... OK
Sending Loader 3... OK
Sending Loader 4... OK
Reading Data... OK
Calculating stage 1... OK
Calculating stage 2... OK
Calculating codes... OK (time - 00:00:19)
Freeze code: 50863582
NET lock: #7465625*638*26490905#
Sub lock: #7465625*782*00000000#
SP lock: #7465625*77*00000000#
CP lock: #7465625*27*00000000#
For check lock status: *#7465625#
Done with Samsung 3G tool ver 9.4