Basically at home I notice I get the best speeds putting my contract sim in a mifi rather than tethering with the phone.
Even so I noticed I was getting around 12-16 meg during the night with the mifi then literally when 8am came round it dropped to about 6 meg then after 9am went down to 3 meg.
Is this just network traffic increasing as people going to work? Or 3 just limiting the traffic as it seems strange it dropped at 8am on the dot i.e 7.59 was getting 12 meg, 8.01 was getting 6 meg