atc at^nvwrex=8268,0,12,1,0,0,0,2,0,0,0,a,0,0,0 (to write the permanent unlock).
The safest is from the Huawei firmware archive at support.huawei.com (if you have an enterprise account) or from DC-Unlocker’s official firmware collection , which costs a small credit fee but guarantees no malware. dialog huawei b310s-925 unlock firmware download
That’s normal. The bootloader is handing over control to the temporary update environment. Don't touch anything. Just watch the bar. IMEI-based unlock without flashing firmware yourself
feature local Sri Lankan experts providing unlocking services. for the Multicast tool or the modified firmware BIN file Unlocking Huawei B310s-925 Router Guide | PDF - Scribd dialog huawei b310s-925 unlock firmware download
If you prefer a remote, IMEI-based unlock without flashing firmware yourself, various third-party services provide this for a fee: DirectUnlocks