Important Warning Before You Start:
The Huawei NMO-L31 (Honor 5C) has a locked bootloader and Huawei no longer provides unlock codes. If your bootloader is already unlocked, you can flash custom ROMs. If not, you cannot unlock it officially anymore (unofficial methods are risky and rare). Check your bootloader status first.
Inside TWRP:
ArrowOS is known for its balance between features and battery optimization. Ideal for an aging tablet battery. huawei nmol31 custom rom updated
