Hardware: Unisoc UMS9117 integrated LTE Cat4 modem (150 Mbps down, 50 Mbps up)
Interface: USB CDC ECM + AT command channel over /dev/ttyS0
The UMS9117 uses Unisoc's custom ION allocator (drivers/staging/android/ion/unisoc/). unisoc ums9117 driver better
Custom ROMs like LineageOS 18.1 (Android 11) or Havoc-OS for UMS9117 devices often include better drivers because they backport newer hardware abstraction layers. For example: Hardware: Unisoc UMS9117 integrated LTE Cat4 modem (150
Warning: Not all custom ROMs are stable. Look for those explicitly stating "updated UMS9117 blobs from [latest stock ROM]." Warning: Not all custom ROMs are stable