EM7455 Verizon Connection Slow

IoT Modules MC/EM Series
1

I just purchased a Lenovo P50 Thinkpad with a built in Sierra Wireless EM7455 Snapdragon and had Verizon put in a micro SIM card. When I connect to Verizon via the EM7455 the connection speed is very slow. If I activate a mobile hotspot on my phone using Verizon and link to laptop my connection is very fast. Running on speedtest.net I get 59 ms Ping, .76 Mbps Download, and 1.53 Mbps Upload on the EM7455. Using a hotspot from my phone (same Verizon netword) I get 58 ms Ping, 7.46 Mbps Download, and 11.47 Mbps Upload.

The EM7455 connection is so slow that I can not run a remote desktop which I can over the hotspot. Has anyone else encountered these issues? I have visited with Verizon, Lenovo, and the company hosting the remote desktop to no avail. I also downloaded the latest firmware and windows drivers from Sierra Wireless.

Thought I’d reach out to Sierra Wireless for customer service.

Thank You,
Tony Glover

2

Try to check which LTE band each device is using. It’s possible your phone doesn’t support them all, and the EM7455 is choosing a newer (but less capable) LTE band than your phone.

3

Had not thought of that. I used the vpn and remote desktop with my old X220 on a GOBI 3G modem. How can I force the EM7455 to use 3G over 4G? At least until the network in Casper, WY is improved.

Thanks for your help.

4

AT Commands are documented on the Sierra Source site.

5

Thanks, I tried to look at the AT commands, between your first and second message, but the document is not available. I found a source for an earlier modem, with directions but the but the 2 other devices that should be in device manager are not there with the Lenovo factory install. I will try to get ahold of Sierra Wireless tech support.

Thanks for your help,
Tony