The Oppo A39 is a 2017 Android 5.1 smartphone powered by the Mediatek MT6750 (28 nm) with 3GB and 32GB internal storage. It features a 5.2", IPS LCD, 720.0x1280.0 display and is available in Gold, Rose Gold.

The A39 is equipped with a Li-Ion 2900 mAh, non-removable, a 13 MP, 1080p@30fps main camera, a 5 MP front camera. The device uses a Nano-SIM + Nano-SIM configuration. It weighs 147 g.

A bootloop on the Oppo A39 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.