[5Z ZS620KL] Slow Wifi speed after july update
My phone has been getting slow wifi speeds after the update. Connecting to internet times out and watching videos will also fail partway.
I tried downgrading by downloading the previous OTA update and sideloading it with ADB, but the device aborts with error code 1 (can't downgrade to update older than installed update).
Is there a way for me to downgrade an update?
I tried resetting network settings, but it's still the same results. Other devices on the same network habe no issues with connections, so it's definitely not a problem with the internet, but with the phone.