This. And most importantly for me, Skype allowed to call using my numbers (for bank it will look like i am calling from my cell). Any other voip service would just put random number which will trigger additional security checks.
My banks mobile app has a Call Helpdesk button, which simply dials the support number with ',,,<long random number>' appended. That gets you into the fast-track queue and they don't need to ask any security questions as they know it's you. They don't look at the dialing number at all.
Would love to hear about service doing that