Ever since the switch to the unlimited plan, our internet is extremely slow. It does not seem to matter how much data we have used or what point in the billing cycle we are at. We use the Verizon 4G LTE Broadband Router. I have read there is an external antenna that can be attached to the router - does Verizon sell something like this? If not, can you provide any information about what kind of antenna I could purchase that may be helpful? We already have an external signal booster outside our home. We are about to the point of just cancelling the entire service as our internet is virtually unusable. Thanks!