Same issues and tech support acted like they’ve never hear the issue before.  Didn’t offer any assistance and said any hardware I connect via an ethernet port they’re not responsible for the speeds. 

Same issue & plus

1- The current modem has been dropping connections so many times during the day.  We have a hard time while connecting/remote to my work place through VPN.

2- The ethernet speed is very slow (60-70mbps)  but wifi is more than 200mbps.

I read these issue from the TMobile forum and they suggested the modem model: G4AR. 

3- Watching youtube on either wifi and ethernet is extremely blurry.  I think Tmobile is limiting the youtube speed on their end.

We called TMobile about the issue and the tech support ask us to pay $55 for the internet service which we have to pay $5 more for our current plans is $50. 

Seems like TMobile is trying to charge the customer more money to get better internet.

The customer service/tech support did not resolved our issue. 

Same issue.

400Mbit on wifi, 2-3Mbit on ethernet. Something broken.

I dumped T-Mobile internet and go back to Xfinity.  T-Mobile has not resolved the issue.

1-slow LAN ethernet speed (70-90mbps)

2-VPN kept dropping 

3-The internet disconnected multiple times/day

4-T-Mobile streaming low quality or low resolution (max 720p).   if you stream from mobil device then you won’t notice this.   Otherwise, from 1080p-4K TV,  The pictures is very very blurry.

I suggest that you guys can dump T-Mobile internet (they are not ready yet as ISP)

I was seeing < 100 on my existing ethernet LAN while getting 350-400+ on the native gateway wifi.

I connected a pc directly to the TM gateway ethernet (bypassing my existing LAN) and saw fast speeds of 300+.

This pointed to an issue with the TM gateway negotiating with my existing LAN. My LAN is driven by my own wifi router.

I had changed my router to use a non-192 prefix IP address for the LAN. So I reverted this back to 192. And now my ethernet is much faster but not as fast as native. Getting 200-250, which is a lot better than < 100.

Doing a lot of testing shows the TM-gateway is throttling / load balancing between its wifi and ethernet ports. My hunch is the amount of devices on my LAN is putting some nominal load so I’m not seeing 300+ on a single device there.

Also my LAN also hosts some access points; these needed to be restarted to hit the 200-250 speeds (they were still stuck on < 75)

 I have the same problem no one could find the error and fix it?