Here’s a ready-to-post guide for the Huawei B312-926 firmware 10031H192SP9C00 (Universal). You can use this on forums, blogs, Telegram, or Facebook groups.
Go to Settings > Dial-up > Network Search and manually select LTE bands. This forces the router to avoid congested 3G or weak Band 20. huawei b312926 firmware 10031h192sp9c00 universal work
Q: Will this firmware work on Huawei B315s-936?
A: No – the B312-926 has a different flash layout. Attempting will hard brick the B315. Here’s a ready-to-post guide for the Huawei B312-926
AT^SYSCFGEX="03",3FFFFFFF,1,2,7FFFFFFFFFFFFFFF,