Forum Discussion

Guide

Aug 30, 2017

4G LTE Modem LB1120 extremely slow speed on T-Mobile

I recently picked up a Netgear 4G LTE Modem model LB1120 to use with my T-Mobile unlimited plan and when I plug the sim card in (from the phone that I'm not going to use anymore) I get extremely slow...

Troubleshooting

therawski

Guide

Dec 14, 2017

I forgot to respond to this but basically my issue was T-Mobile screwed up when they activated the line and didn't give me my full server. I'm now under the impression that the custom firmware just resets all the tethering traffic's ttl to look like it's coming from the phone.

LGTurk

Tutor

Dec 15, 2017

Thanks for response. To refresh, my hardware configuration is:
Netgear LB2120 cellular modem (with T-Mobile cellphone SIM installed )with LAN port connected to Linksys EA6350 router.
The PC fix you provided works great. I wonder if there is a clever way to change the router or modem such that any device I connect to the WiFi network will not be throttled back by T-Mobile? That would be the big win !

therawski
Guide
Dec 15, 2017
You can using dd-wrt
Just google it
You'll need a compatible router and you'll have to do some research into how to set all traffic to the ttl in the setting
I haven't done it yet and I don't know when I will because I would have to get a new router so good luck if you attempt it yourself
- LGTurk
  Tutor
  Dec 16, 2017
  Looked at DD-WRT. Unfortunately the EA6350 doesn’t lend itself well to being reprogrammed. I may look at buying a WRT router a little later and jump into the water. I used to write code for ARM9 processors in my younger years. Used JTAG and full-up IAR development suite. Sounds like many use a serial connection to do bootstrap loading etc. Sounds like fun as soon as I get the time...