Assuming you’re meaning Siam Commercial Bank (SCB). Their
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hotline works well with good English speakers. They don’t have a web based online access these days it’s all done on a phone or tablet app. Only one device has access to the account, regardless that it may be a joint account.
Their app I have found to be excellent. I can do most things from it that I need from it. Some specific things will still need a visit to a branch but these days they are way less than the old days.
I don’t have other accounts with other banks so I cannot compare with any other banks.