Oh man, I worked at a call center for a little over four years doing internet technical support... Never again.
I am thankful for those that can push through it (especially on the more direct customer service side of things), as I certainly don't have the cognitive fortitude for it.
One of my roles at my current job still involves a lot of support, but at least its not over the phones thankfully.
I did that once. Now I try to get them to laugh on the phone, ya know? Make their day a little better without disrupting their average handle time stats.
Telephone support people have helped me hundreds of times in my life, I’ve have had phone calls with people who have been really kind and thoughtful and done a lot to help, going above and beyond the call of duty.