The HTC Desire 820s dual sim is a 2015 Android 4.4.4 smartphone powered by the Mediatek MT6752 (28 nm) with 2GB and 16GB internal storage. It features a 5.5", IPS LCD,, 720.0x1280.0 display and is available in Marble White, Milkyway Gray, Monarch Orange, Santorini White, Tuxedo Gray.

The Desire 820s dual sim is equipped with a Li-Po 2600 mAh, non-removable, a 13 MP, 1080p@30fps main camera, a 8 MP, 1080p@30fps front camera. The device uses a Nano-SIM + Nano-SIM configuration. It weighs 155 g.

A bootloop on the HTC Desire 820s dual sim 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.