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How to Hard Reset — Microsoft Lumia 640 LTE Dual SIM
How to Hard Reset — Microsoft Lumia 640 LTE Dual SIM
The Microsoft Lumia 640 LTE Dual SIM is a 2015 Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10 device powered by the Qualcomm MSM8926 Snapdragon 400 (28 nm) with 1GB and 8GB internal storage. It features a 5.0", IPS LCD, 720.0x1280.0 display and is available in Glossy cyan, Orange, White, Matte black.
The Lumia 640 LTE Dual SIM is equipped with a Li-Ion 2500 mAh, removable, a 8 MP, 1080p@30fps main camera, a 1 MP, 720p front camera. The device uses a Dual SIM (Micro-SIM, dual stand-by) configuration. It weighs 145 g.
Hard Reset on the Microsoft Lumia 640 LTE Dual SIM works differently than it does on Android, since this platform uses its own menus and terminology. Follow the steps below, written specifically for this device rather than adapted from Android instructions.
On this device this is just a forced restart/power-cycle — it does not erase data by itself. See Factory Reset for the data-erasing option.
Windows Phone devices generally don't have a hardware button combination that wipes data the way Android's Recovery Mode does
The closest equivalent is the in-menu Factory Reset described in the Factory Reset guide below
If the device is completely frozen and won't respond to the Factory Reset menu, remove the battery for 30 seconds (if removable) to force a restart, then try again
Exact steps vary by exact model and firmware version — check the printed manual or the manufacturer's support site if these don't match your device
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