If you're on an actual visa no, as you would need a re-entry permit to keep it alive otherwise it just dies on exit, but youcan't apply for another visa while still holding a valid one.. If your on an extension of stay you can, again you would need to have a re-entry permit to keep the extension alive but you can tell the immigration officer you want stamped in on the DTV. I'm kind of assuming you want a safety net in case the dtv is unsuccessful
The only way to get off a Non-OA is to wait until it expires. So either leave Thailand on the last day its valid and return to Thailand the following day on a visa exempt entry and go and apply for a Non-O at your local immigration office by meeting the requirements. If you are on the 2nd year you can get out of that visa leave anytime during that 2nd year without a re-entry permit and come back visa exempt as above. Or while out of Thailand you can apply for the Non-O at the Thai consulate that serves whatever country you are in
there is zero flexibility. It's not the job of immigration to help you open a bank account, but they will normally issue a residence certificate which may help as a lot of the bank issues are down to lack of ability to verify your ID successfully. I doubt anyone could walk into a bank in Oz and just say here I am, just arrived on a short term 3 month tourism visa, can I open an account please.
Anonymous participant when they ask for all pages they mean every single page including blank pages. This is often a final check to make sure you are still in the country you applied from
the ability to convert to a Non-O visa inside the country has been around for a long time. The banks have recently got a lot stricter on who can open a bank account. Are you saying immigration should stop offering this service just because YOU are having difficulty opening a bank account?
its all perfectly logical. It is possible to open a bank account on any visa or no visa at all, its just very difficult. If your wife has a bank account start with that bank branch, if she doesn't find another thai of sufficient standing to vouch for you and get a residence certificate from immigration before you go. You might need to try many branches of many banks though