Re-lock the bootloader: fastboot oem lock (wipes data) or flash the vbmeta.img with --disable-verity flag.
Wait until a green checkmark or a pop-up box appears on your screen. Disconnect your phone and power it on. Note: The initial boot may take up to 10 minutes. Critical Troubleshooting Tips firmware wiko t10 top
Flashing firmware is safe if done correctly, but you prepare to avoid permanent damage: Re-lock the bootloader: fastboot oem lock (wipes data)
Flashing a mobile device modifies low-level flash memory. To avoid critical process interruptions, you must thoroughly complete each item on this preparation checklist: firmware wiko t10 top