When I call a tech support line, I usually use Skype. This keeps my other lines free and gives me the greatest freedom to stay on hold if necessary. I don’t have to worry about my cell phone battery going dead or tearing through hundreds of cell phone minutes that could be put to better use elsewhere. With a reasonably comfortable headset, I can continue to do other work while waiting to speak with a support representative.
Well, I think here in UK this could be a problem. Unfortunately almost of support numbers start with 0844 which, sometimes is free, but it is not 0800.
If you are using Skype with an unlimited plan then it usually doesn’t matter if the call is free or not. Beyond the cost though is the freedom of keeping your other lines free.