been calling from UK to Ukraine I listened music sometimes (like Hold option) without hearing dialing sound. After cancelling I've seen that money were taken like for outgoing call. What was that?
Also I want to ask how to change sim cards correctly to park my number? I'm using Galaxy S4 and it's impossible to change sim card without removing the battery that blocks sim card. After restarting smartphone Roamer said that I forgot to park my number (although I did) and gave me temporarily number that I used.