When my SIM card is in NOS’s router the wifi is on average 1MB/S, sometimes less, seldom more. The same SIM card in my phone instead of the router, in the exact same location, the wifi average is 20MB/S.

Don’t think its a coverage problems for this reason. Also a friend who’s living 50 meter from me using the same router and NOS sim card has an average of 20MB/S wifi speed. 

Would appreciate help as “catching” an English speaking agent in an impossible, very frustrating mission .