Huawei Mediapad T1 70 Custom Rom: Top [verified]

Before LineageOS existed, CyanogenMod was the titan of the custom ROM world. For the T1 7.0, is often cited as the sweet spot.

While not a traditional "custom ROM" like LineageOS, there are official builds for similar models (like the T1-A23L) that have been used as base ports for the T1-701 series. This is the highest "official" jump you can typically make to Android 5.1. Xposed Framework & Modules huawei mediapad t1 70 custom rom top