5G Home Internet vs. phone data speeds

Mine is  just the opposite. My S22 Ultra  will get 400 or better  during  off peak time standing  next to the modem while the home internet  .odem will  peak at a little  over 300

Denny, they definitely use the same tower. The "kid" in the T-Mobile store was wrong.

As far as speeds, iPhones and Androids are throttled because of limited battery and CPU power. If you place a T-Mobile gateway in one of the areas of your home where you have great reception of 5G, you'll be pleasantly surprised at the speed you'll get OTA.

Also, there is a 2-week, no questions asked trail period. Give it a shot while you still have your old ISP and see if you can achieve speeds that will satisfy your home's needs. Otherwise, return it.

For me, I had Xfinity 800 Mbps, but I hated having to negotiate the price every year, and I really didn't like the data caps imposed on users. I am not a gamer, but we do stream a lot of TV and have multiple computers, iPhones, smart switches and gadgets. In my environment I get approximately 50-70 Mbps down and 10-11 mbps up, but I can only connect via 4G. The 5G signal isn't strong enough or can't make it through all the trees surrounding our home or through the concrete block construction of our home in S. Florida. 

The bottom line is that the bandwidth I receive is more that enough for our activities. We also use T-Mobile as the provider for our iPhones, so that qualifies us for $25 per month rate, all-you-can-eat for life, I'm a very happy camper. From what I can tell on this forum, there are some problems, especially for gamers, but for most people who can get good access to 5G, people really like the service.

Mostly… T-Mobile has deprioritized Home Internet over cell.

I can get as good, if not faster on my Home Internet .. just not as often,

S21 ≈ 150-200Mbps indoors - 5G disabled (becomes worse with 5G enabled, as it is weak from +1 mile away), LTE ≈ 1000' away.  During the day, ≈ 150Mbps.  Night time ~200Mbps.

Home Internet ≈ 50-200Mbps, typically 50-150Mbps, but some times as low are  10-30Mbps.  During the day ≈ 75Mbps.  Night time ~=150 upwards to 200Mbps or better.

Upload is typically 30Mbps on both.

I should notice better performance once T-Mobile upgrades the local tower.

That is exactly why I strongly recommend anyone who is interested to do the trial run and not dive in after termination of the current service. It could be T-MOBILE is still working on the towers in the area. They tend to start loading before they are done I think. Some instances it seems as if users come on and speeds are great only to go south after a month or two. 
With a VPN keep in mind your packets will be encapsulated in the tunnel. You might need to lower the MTU from 1500 bytes to I think 1440-1460 bytes. Large max size packets are where the problem can be encountered. 
You might check downdetector.com to see if there are reports of outages for T-MOBILE in your area. 

The difference between the two is somewhat explainable. On the T-Mobile 5G cellular network phones on the same cells/frequencies as the gateway devices will have priority due to being phones. Often people overlook the cellular antennas and chips in the devices. They are not equivalent so the difference in the two cellular hardware components has to be considered. If you are running testing from the gateway is is probably tested over IPv4 whereas your phone could well be IPv6 not IPv4 so the routing for the two can different. There would also be a bit more overhead with the gateway over IPv4 due to the 464XLAT and the translation from IPv4 to IPv6 and back to IPv4. Plus you also have to run a speed test against the same server in many cases. The "optimal" server the test each uses also can be different and render results that are not even close. 

I agree 100% with "formercanuck" the phones do have priority over the fixed broadband gateways due to the nature of cell phone calls and roaming from tower to tower. Testing with a cell phone vs. the gateway can be rather deceptive. From one manufacturer's cell phone model to another there are often huge differences in the radios in use. If you buy a premium cell phone you are getting better tech than the average cell phone so it is not a comparison that will lead to conclusive results. 

The service in one area vs another can vary greatly and it seems to come down to higher density urban areas with heavier user loads requiring the use of bandwidth throttling due to load. T-Mobile may be expanding their network but it seems to me the cells are still often loaded heavier than is optimal for service to be what users are/were expecting. The ONLY way you will know how the T-Mobile solution will work for you in your location is to try it out. Exercise the solution as much as you can during the trial period to profile proper expectations. You can read threads on Reddit, here and other forums and get a better idea as to if it is what you will find satisfying or not.

T-Mobile runs a IPv6 network and a 464XLAT solution so don't expect NAT and port forwarding controls you might have become reliant upon without a VPN solution. Games that rely upon UPnP are not going to be functional on the T-Mobile solution. Go read the FAQs on the T-Mobile pages. Don't be blind sided by not researching the details. I know the T-Mobile home gateway solution can be pretty darn great in some markets. Here we are in a rural area with n41 for the data load and it is very good. We started out with n71 delivery and then they upgraded the cell to n41 and the speeds just about doubled. Still the speeds vary depending upon the time of day/night and load. Weather can also be a factor. Well, there are a number of factors but if your location is close to a cell source and good clear delivery it can be pretty good. In higher density markets where user load is heavier that equation may not work for you.

If you are interested in the way the tech is used: (interesting read)

https://prateek-mishra.medium.com/en-dc-overview-62d35521edc4

Thanks for the feedback, everyone. I decided to do the trial run. I've had the gateway up and running for about an hour on a Friday afternoon, which I assume is a pretty decent time to test signal strength at peak (or close to peak) usage time.

Im getting speeds ranging from 45-220 down depending on the device and the room I'm standing in, and from 7-12 up. The lowest of those numbers is still better than I'm used to from AT&T in my neighborhood. So far, so good.

One curious thing though - the video streaming is nice and fast on my work laptop. However, when I sign into my work's VPN and attempt to load one of the web pages that requires the VPN, they no longer load. The VPNs are signed in and connected, but the work-related pages that need the VPN are not loading anymore on the T-Mobile wifi. Am I just missing a setting or something?

Welp. At about 4:30pm on Friday the download speed plummeted to 11. By 5pm it was 6Mbps. On top of that, my cellular service dropped from 3 bars to 1 (even briefly went into SOS mode). 
 

I expected a drop at peak hours. But I'm not sure total paralysis of the service during work hours is something I can deal with long-term. Those are peak hours for a reason. People need internet / cell service most at that time of day. 

The safe size of packets for an IPsec VPN is 1328 bytes. 
TechTarget.com (search for Managing VPN bandwidth)

There is also a MTU article in the Dig Deeper on WAN tech. 
This assumes you want to geek out. 😎

This seems like a similar topic to what I am looking at.  My 5G home internet is typically about 60-90 MBS down.  But I am curious why my phone on 5G in the same location (iPhone 12) is getting about 3X the speed down?  If my phone and the home internet gateway are in the same location, why would the gateway be that much slower?