It completely blows away everything on the internal storage (but not SD cards), so no going back without reflashing from another device. You might want to have

It completely blows away everything on the internal storage (but not SD cards), so no going back without reflashing from another device. You might want to have a stock image from the manufacturer handy just in case. I struggled with a "Baseband: <not found>" error for an entire day (preventing calls and sms) until I flashed an image that worked. Though if you want the real Google ecosystem back, instead of going back to stock, try reflashing LineageOS and add in the MindTheGapps zip. MindTheGapps includes the real Google Play Store and other components, just like most Android phones. The LineageOS flashing directions for your phone should mention when and how to do that. You'll have a phone with Google, but without BS apps that you can't delete (aside from simple phone, sms, contacts, camera, etc apps), and should run faster. https://wiki.lineageos.org/gapps/ https://wiki.lineageos.org/gapps/