The Lenovo S820 is a 2013 Android 4.2 smartphone powered by the Mediatek MT6589 (28 nm) with 1GB and 4GB | 8GB internal storage. It features a 4.7", IPS LCD, 720.0x1280.0 display and is available in Flamingo red, Charcoal Black, Pearl White.

The S820 is equipped with a Li-Po 2000 mAh, removable, a 12 MP, Yes main camera, a 2 MP front camera. The device uses a Dual SIM configuration. It weighs 143 g.

A bootloop on the Lenovo S820 occurs when the device repeatedly restarts without fully loading Android. This is commonly caused by a failed software update, corrupted system files, or an incompatible app. Most bootloops can be resolved without losing data by clearing the cache partition first before attempting a factory reset.

Factory reset may be needed as a last resort — erases all data.