yes I transferred a minimum of 65k monthly into my K bank account and they provided certified bank statements for 22 months and a covering letter for the immigration this was for my second extension, previously I used the 800k method.
I have friend who gets a 60 day tourist e-visa multi entry then does a 30 day extension, then a border run, on re-entry you get another 60 days, using this method you can get up-to 9 months, put please fact check the above I’ve not done this myself.
I converted my sim to eSIM at AiS shop in Central and upgraded from 4g to 5g it took a few minutes, unlimited data cost just over 400 THB per month pad as you go no contract.