Huawei E8372h-320 is a popular 4G/LTE USB "Wingle" (a hybrid between a USB modem and a Wi-Fi hotspot) AliExpress
For units where the unlock code entry is disabled, users often flash "stick mode" firmware to bypass carrier-imposed HiLink restrictions. huawei e8372h320 unlock
Carriers subsidize the cost of these dongles. They sell you a $50 modem for $20, but they lock it to their network so you cannot use a cheaper competitor's SIM card. When you insert a "foreign" SIM, the modem forces a redirect to a "SIM Lock" page (usually http://192.168.8.1 displaying an error). Huawei E8372h-320 is a popular 4G/LTE USB "Wingle"
Warning: unlocking can void warranty, may violate carrier terms, and carries risk of bricking the device if incorrect codes or firmware are used. Proceed only with devices you own and in accordance with local law. When you insert a "foreign" SIM, the modem