Horrible Data Speeds in Boston Subway (Full Bars of 4G LTE)

[nickisdacube]

Hello,

I recently switched from Sprint to Verizon because of the lack of service. I have a Samsung S8 Plus.  and I have been receiving horrible data speeds while in the Boston subway.  I have full bars and LTE service at the time per the screen shots below.  Is there something wrong with the network in the area?  I don't know how much longer I can deal with this.  I switched specifically so that I could have service on the commuter rail and subway and it seems I am getting worse service then I did with Sprint.  Please help!