The ZTE N721 is a 2011 Android OS smartphone and 150MB internal storage. It features a 2.8", TFT, 56K colors, 240.0x320.0 display and is available in Black.

The N721 is equipped with a Removable Li-Ion 1100 mAh battery, a 2 MP, Yes main camera. The device uses a Mini-SIM configuration. It weighs 105 g.

A bootloop on the ZTE N721 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.