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Microsoft Lumia 640 XL LTE Dual SIM
Reset & recovery guide · Phone · Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10
Phone

Microsoft Lumia 640 XL LTE Dual SIM — Hard Reset, Factory Reset & Recovery Mode Guide

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Hard Reset via Recovery — Microsoft Lumia 640 XL LTE Dual SIM

Optimized for Lumia 640 XL LTE Dual SIM (Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10)

⚠️ A hard reset erases ALL data (apps, photos, accounts). Back up first.
1
Microsoft Lumia 640 XL LTE Dual SIM runs Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10.
2
Power off the device.
3
Press and hold Volume Down + Power together.
4
Release only the Power button when the phone vibrates, keeping Volume Down held.
5
When an exclamation mark (!) appears, press Volume Up, then Volume Down, then Power, then Volume Down again, in that exact sequence.
6
Windows Phone hardware combos vary by manufacturer — this sequence is specific to Microsoft and isn't the same on other brands. If it doesn't trigger anything, use the in-menu Factory Reset method below instead.
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Factory Reset from Settings — Microsoft Lumia 640 XL LTE Dual SIM

Optimized for Lumia 640 XL LTE Dual SIM (Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10)

⚠️ Permanently deletes personal data. Make sure backups are saved.
1
Open Settings on your Microsoft Lumia 640 XL LTE Dual SIM (running Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10).
2
Tap "About" then "Reset your phone".
3
Confirm you want to erase everything.
4
Your Microsoft Lumia 640 XL LTE Dual SIM wipes all data and restarts with the setup screen.
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Enter Recovery Mode — Microsoft Lumia 640 XL LTE Dual SIM

Optimized for Lumia 640 XL LTE Dual SIM (Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10)

✅ Safe to enter — this does not erase any data.
1
Microsoft Lumia 640 XL LTE Dual SIM runs Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10. Its closest equivalent to recovery mode is the same button sequence used for a hard reset.
2
Power off the device.
3
Press and hold Volume Down + Power together.
4
Release only the Power button when the phone vibrates, keeping Volume Down held.
5
When an exclamation mark (!) appears, press Volume Up, then Volume Down, then Power, then Volume Down again, in that exact sequence.
6
This is a one-way trigger — only start it if you intend to reset. This sequence is specific to Microsoft and isn't the same on other manufacturers' Windows Phones.
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Lock Screen / Reset Notes — Microsoft Lumia 640 XL LTE Dual SIM

Optimized for Lumia 640 XL LTE Dual SIM (Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10)

For legal owners only. Do not use on lost or stolen devices.
1
Factory Reset Protection (FRP) is a Google/Android security feature and doesn't apply to Microsoft Lumia 640 XL LTE Dual SIM (Microsoft Windows Phone 8.1, upgradable to Microsoft Windows 10).
2
Most non-Android platforms don't lock the device to an account after a reset.
3
If your Microsoft Lumia 640 XL LTE Dual SIM does prompt for a security code after reset, check Microsoft's support site for their specific unlock process.

Why reset your Microsoft Lumia 640 XL LTE Dual SIM?

A hard reset on the Microsoft Lumia 640 XL LTE Dual SIM fixes boot loops, forgotten PINs and persistent lag. The method above will wipe the device back to factory condition. Always back up your data first, as a reset cannot be undone.

Frequently asked questions

Will a hard reset delete everything on my Microsoft Lumia 640 XL LTE Dual SIM?

Yes. A hard reset (also called a factory reset) erases all apps, photos, messages, and accounts, returning the Microsoft Lumia 640 XL LTE Dual SIM to its out-of-box state. Back up anything you want to keep before starting.

Does resetting the Microsoft Lumia 640 XL LTE Dual SIM remove the SIM lock or carrier lock?

No. A hard or factory reset only clears data and settings — it doesn't remove a carrier/SIM lock, which is tied to the device's IMEI at the network level. You'd need to contact your carrier for an unlock.

How long does a factory reset take on the Microsoft Lumia 640 XL LTE Dual SIM?

Typically a few minutes, though it can take longer on older or heavily used devices as more stored data has to be wiped.

Does the Microsoft Lumia 640 XL LTE Dual SIM lock to an account after a reset?

Usually not — Factory Reset Protection (FRP) and Activation Lock are Android and iOS features. Most other platforms, including this device's, don't add an account lock after a reset.

How do I format my Microsoft Lumia 640 XL LTE Dual SIM?

"Formatting" and "factory resetting" mean the same thing for the Microsoft Lumia 640 XL LTE Dual SIM — both erase all data and restore default settings. Use whichever method above matches your situation.

What is recovery mode on my Microsoft Lumia 640 XL LTE Dual SIM?

Recovery mode is a stripped-down menu outside the normal operating system, used to wipe data or apply updates when the Microsoft Lumia 640 XL LTE Dual SIM won't boot normally. See the Enter Recovery Mode section above for how to reach it on this device.

Can I factory reset my Microsoft Lumia 640 XL LTE Dual SIM without the password?

Yes — the reset methods above don't require your lock screen password, since they bypass the normal login screen entirely.

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