IB told me bank statements didn't work. When I opened the bank account I put an address for the bank and there was no control whatsoever on it. There are international banks where you can do trading that DO require a Proof of Address, so a bank statement from Citybank might work, while a bank statement from CBD or NBD might not work. And of course DEWA bills work, but the ejari is much easier/quicker to have, I mean you︀ need an EJARI to have a DEWA bill. You can do the ejari, register it︁ with dubai land department, open all the accounts and cancel the ejari in 15 days.︂
I mean, I tried it,︄ it would have saved me 9000 AED. Nothing wrong in trying of course, that's super︅ easy to get.