My phone (1) had wifi issues from the stock rom.
The signal strength comes out normally, but when I actually use Wi-Fi, the speed becomes very, very slow after a while, and each time I had to turn Wi-Fi off and then turn it on again.
(Even after going through this process, the actual Wi-Fi operating time at normal speed did not exceed 1 minute.)
I tried to send A/S, but the distance was too far, and I gave up because there was no answer even when I inquired on the official page.
I've tried all custom roms, and all of them had problems with WiFi, and the only custom rom that my WiFi worked normally was Topaz Alpha 3.
I don't know how the developer solved this problem, or where there is a difference from Topaz Alpha 3 in the case of other custom roms, but I really wanted to tell the developer this.
Thanks to the developers of Topaz Alpha 3.
Without the Topaz Alpha 3, I wouldn't have been able to afford my data bill.