Online Tips n Tricks

Hello,
tried getting the code by https://a-zgsm.com/huawei.php
but it doesn't work for me.
Could you please help me obtain the correct code?
IMEI 866539017067828

Could you also help me to upgrade firmware if needed? Where to get it and what software to use?
Thanks

IMEI: 866539017067828
56268290
26018980
39624472
try this

Hello,
Could you help me unlock Huawei e3531s-2

Imei: 860556026692640


Any assistance appreaciated!!