There is that reliably works for free on CPH1941 running Android 9/10. However, here is a manual method that works (updated 2024-2025): Method: Using the "TalkBack" & "Gboard" Glitch What you need: A stable Wi-Fi connection.
Take the phone, the original box (with IMEI), and proof of purchase to an Oppo Authorized Service Center . They will reset it for free or a small fee. Oppo Cph1941 Hard Reset Unlock Tool
This erases all your data (apps, photos, contacts). There is that reliably works for free on
| Tool Name | Compatibility | Price | Difficulty | | :--- | :--- | :--- | :--- | | | CPH1941 (MTK) | ~$45 | Easy (Windows) | | Tenorshare 4uKey | CPH1941 | ~$49 | Easy | | SP Flash Tool | Free (Technical) | Free | Hard (Requires scatter file + Auth Bypass) | They will reset it for free or a small fee