Xlence
Questions & Answers

I dont have one myself, but from what I understand, you would have to be muslim, and register as such with them, or send them a proof of that. Then they enable your aaccount to be Islamic (meaning, swap-free). There willl be no overnight interest fees (riba) for you then. If you are muslim, should be easy enough.

Depends on who you are. IF you are a muslim trader, or come from muslimn countries, ist pretty easy for you. You just send them a message, to support, and they review your docs, and in a day they approve it for you. If you are non-muslim, they dont have no-swap accounts for you.
Muslim swap-free is not unlimited too. There's a 7-day grace period, and after that it depends. For major pairs there's no swaps for the first 30 calendar days, for other instruments its usually 10 calendar days. NOT infinite.