Bell Canada sent me a 4G Sim card. I installed it and my reception was reduced by 50%.  4Bars to 2Bars maybe.

When I called I was told it does not work in all areas.  There are new towers being installed in our area and the problem will be resolved. I requested a new 3G card.  I have received a credit and will be getting a new 3G card.  In our area there are not enough 4G towers to make the service work. 3G will penetrate obstacles easier due to the frequency. If we install the 4G card then the people of our area will support the cell tower placements so their phones will work. Beware, do not put your neighbour in danger with a ill placed towers. Do not destroy the 3G Sim card as instructed until you check it out.