Okay I happen to be in desaru currently and am planning to go to jb town tomorrow , and am very keen to open a SG account with my wife. Which would the most convenient to open ?

Any charges if balance is lower than the minimum amount allowed ?

How to open for non-Singaporean? Need physical attendance?

Able to have USD account?

Yes. Being priority customer with Standard Chartered SG have one of the best perks
1) no min amount for their brokerage. You just pay 0.18% of what you buy/sell
- their brokerage provide one of the best access to worldwide markets
2) able to deposit and withdraw USD cash without fees  On withdrawal part, need to kawtim with RM to waive the withdrawal fees

Normal customer have to pay min fees of SGD10 if you don't hit the 0.2%. Priority  customer does not need to pay for that SGD10. They can buy and sell small amount and pay say only SGD1/transaction (depending on how little they buy)

Will the priority banking status in Malaysia be revoked if you drop below the required amount? Or do they require certain period of maintaining that balance (eg. 6 months)? How about for RHB specifically?

I'm considering signing up for RHB premier to get the RHB premier visa infinite credit card, but prefer to move my money somewhere else. If I lose my RHB premier status, will they cancel my credit card?