I had the same from Bangkok bank and had to get confirmation that the phone number was my number, also since I took the phone number contact out many years ago I have a new passport, so it appeared that this needed to be undated as well on the phone contract.
You may already know, but its woth pointing out that whenever you withdraw funds outside of the province that your account is based in you will get charged a fee.
Me too, last week had the phone number for 20 odd years but in that time I had a new passport number, that was the main problem, so anyone with a Thai phone number who gets a new passport needs to report it to the Phone service provider, I had already reported the new passport number to the bank.
I think the DTV will change very soon, this visa is the reason its so much a pain in the arse now to get a bank account, especially with Bangkok Bank which is the only International bank in Thailand.
The only way to get the correct rules and proceedure to open a business in Thailand is to apply to your nearest Thailand Embassy in your own country, not Google or on a web site.
Just go on the Thai Embassey website in the country where you live, if you cant understand English have somebody with you who can understand English and can tell you the Thai Embassy rules.
Its life here mate, why do everyone who comes here expect it to be the same as their own countries ? Certain things are much better, the weather, the cost of living and NO illegal immigrants, illegals here are ejected immediately, and to live here you have to prove you have funds to support yourself.
The girls have children so there is someone to take care when they get older, there is no social security here, not many girls with children actual ever went through a marriage ceremony, it does not mean anything here the Thai blokes just piss off whenever they find another girl.