Use a high-quality data cable (not just a charging cable).
Most Huawei E5372 devices are sold through carriers like Vodafone, EE, or MegaFon. These versions often come with restricted "branded" software. Switching to a universal (unbranded) firmware offers several benefits: huawei e5372 firmware universal download
Perform a hard reset by holding the reset button under the battery cover for 10 seconds. Important Safety Warning Use a high-quality data cable (not just a charging cable)
Save your APN settings as they may be wiped during the flash. How to Download Huawei E5372 Universal Firmware huawei e5372 firmware universal download
Resolve issues with device freezing or battery drain. Technical Specifications of the Huawei E5372
It does magically add new LTE bands—that’s a hardware limitation.