Speedtest.net will test your Ping rate (which is latency). Anything over the 60's to 70's is a problem. High Latency means that the bandwidth is choked (too many people sharing the pipe). It will also test your do Download and Upload speeds.
Please post your speedtest.net results here. You can get speedtest.net from the playstore. Post what city and state you are in, and post your PING results, DOWNLOAD, and UPLOAD results. State if you are paying for 4g LTE.. 4g LTE is suppose to be between 5mbps and 10mbps...
I'm in Boise Idaho. Mine today is PING 133, DOWNLOAD .79 (not even 1mbps), UPLOAD 1.48. TERRIBLE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!