LOTS of reports of Ooredoo's network not properly working yet, as well as many shops selling the new Ooredoo sim cards marked up to 40,000 kyats from their initial price of 1,500 kyats.Â
So ask around first.
Telenor (another new telco) will be launching their sim cards in a few weeks, so if you can't get a working Ooredoo sim card (or they are asking for an inflated price) then wait until the Telenor sim cards are released