I use modem Smart Telecom AC 682 more or less already 3 months but their connection is rather slow compared to other cities like the one in the ads.
Downloaded via idm course. package with a volume of 600 MB free dapet 5 kbps, has to replace the profile as my previous post here there are modifier but not too significant. Try a suggestion from a friend that is elevate the modem using a usb cable additional 1.5 metres.
Finally that from 5 kbps to 20-25kbps package with 600 MB volume, has been in the empty hours can be up to 60 Kbps download via idm.