Hey,
we have Blueline. They promise 512k via 4g for 109000 Ar per month.
They deliver mostly, but not always. Around 5pm, they get unbearably slow, which is predictable so its ok. However they have periods of several days when they are unreliable all the time (like the last two days). This sucks, if you work on the net like myself, you're out of work.
All friends with Blueline say the same, so it's not my modem or bad coverage.
Moov from Telma costs about the same, and is supposed to be just as bad. This provider called "Life" is supposed to be better for a similar price, but it's hard to find information about them.
Orange is leagues better, but infinitely more expensive (pay per data volume ... )
It looks like Madagascar is to remain the country with the world's most expensive internet! yay! 