O2 LTE Wireless Router HUAWEI E390s-2 Gateway can be unlocked with FMC unlocker software and some guidelines which I will provide you.
How to Unlock O2 LTE Wireless Router HUAWEI E390s-2?
1. Download FMC unlocker software from the link which is provided at the end of the article.
2. Now disconnect from the internet and eject the router from PC.
3. Now run the FMC unlocker.
4. Now connect O2 LTE Wireless Router Huawei E390s-2 to PC using LAN port.
5. Now your O2 E390s-2 will be detected by FMC Unlocker.
6. Now put password as unlock code and click Unlock.
7. Now your O2 LTE Router E390s-2 is unlocked forever.
Now you can enjoy the unlocked O2 LTE Wireless Router Huawei E390s-2 with any another network provider SIM in the world.