Regarding UNO, the pay is depending on the project you work for. They have english and spanish projects and of course, english projects pay more than the spanish ones.
Currently the average pay for the english projects at UNO is 110 but you start off getting pay 65 per hour for the training period (normally 2-3 weeks). Once the training period has passed, you get paid 90 per hour for 3 months and then you get paid 110 per hour. There are other positions as a CSR that pay 120 per hour.
The pay is weekly which is great and you'll make a good 4k+ easily every week. Most employees make an average of 44 hours a week at 110 per hour which comes down to 4,840 per week and every hour after those 44 hours are counted as extra hours which are paid at a higher rate.
They also have a night-incentive program which allows you to make even more $$. If you're logged in until 12am or after, all the hours you worked during that day, are paid at an additional 15% more.
Compared to the other CallCenters in Satiago, I'd say UNO is one of the best paid jobs you'll find (english programs of course). I work there btw, and I have friends working in Vimenca, GlobeCom and Synergy and they're not too satisfied with their jobs because of different Issues. I'd suggest that you ask around to currently employees of those companies but I STRONGLY recommend that you ask about the english programs because the spanish ones, pay almost nothing. no matter which company it is.