Increase Windows Phone 10 Swap File Size on Lumia 640

For the past few months my Lumia 640 (running WP10) has had a bunch of issues that made it tough to use as my daily driver.

Increasing available swap file size to 768mb has fixed the worst of these issues.

Issues Fixed

• General share screen failures (attaching photos to MMS was my big one, sharing photos to email, sending URLs to Poki…etc)
• App Switching (number of apps in cache, apps reloading when switched to, basically trying to run ANYthing else at the same time as Outlook)
• Doing almost anything from the lock screen is quicker (Camera launching, enabling mobile hotspot)

Instructions (for L640, others may vary)

1. Install Interop Tools (see XDA link in credits – I sideloaded it, store version may work)
2. Choose “This Device” as provider (NOT “…through provider extensions”)
3. Unlock -> Interop Unlock -> Restore NDTKSvc -> ON
4. Reboot device
5. Launch Interop Tools
6. Registry Browser -> Browse to “HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PagingFiles”
7. Change from “256 256” to “256 768” (or whatever amount of available space you’re comfortable sacrificing)
8. Reboot device

Credits

• Install Interop Tools: https://forum.xda-developers.com/windows-10-mobile/windows-10-mobile-apps-and-games/app-interop-tools-versatile-registry-t3445271
• Registry Key: https://www.reddit.com/r/windowsphone/comments/5vihpg/speed_up_1gb_phones/