I¡¯m looking to buy a MiFi router so we will have it with us when we arrive in 5R8. If we buy the local SIM card, we can directly ask the shop to activate it and test it on the spot. Sometimes it can be difficult to get it working (we had that problem in Mozambique).
I checked on the web site of Telma but it does not show a shop at the airport in Nosy Be. I have sent a message to Telma to check if there is a shop.
I have seen the coverage map from Telma and it looks abit the same as Orange.