I was recently taking of from Mumbai on my way to London and as I was passing through 3000 feet, I had to do something and I requested a frequency change because I had to leave my device. The controller told me to stay on his frequency. Some of you may know that on Vatsim, you can ask the controller to go AFK and I think that would be very helpful for IF. If we are getting creative maybe you could request a certain amount of time. Probably would have to be on Expert only to prevent spamming.