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Updating the software on my mobile phone - Device Guides - Optus

To achieve a "working" 7.1.2 environment, technical users often use community-developed ROMs. Experts from Techcare.vn note that these require: unlocked bootloader A custom recovery like Risk Acknowledgment oppo f1s firmware download 712 work

You must have an unlocked bootloader and a custom recovery like TWRP (Team Win Recovery Project) installed. Updating the software on my mobile phone -

This process may erase your files; always back up first. the solution will resolve slowdowns

But for 99% of users, the solution will resolve slowdowns, boot loops, and password locks.