The Plum Sync 4.0 is a 2014 Android 4.4 smartphone powered by the Mediatek MT6572M (28 nm) with 256MB and 512MB internal storage. It features a 4.0", TFT, 480.0x854.0 display and is available in Black, White, Red, Blue.

The Sync 4.0 is equipped with a Li-Ion 1200 mAh, removable, a 5 MP, 720p@30fps main camera, a 3 MP front camera. The device uses a Dual SIM configuration. It weighs 97 g.

A bootloop on the Plum Sync 4.0 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.