Solved: High Speed Tethering to New PC

MistaB · ‎09-04-2025

Hi.

I am appealing to you guys who tether from your phone to your pc. Mine is working but I would like to find out how to use all of the available speed, if that's possible.

I have two phones, a Z Flip 2 and a S23 Ultra and both are giving roughly the same results around 800 Megabits per second.

When i connect to USB or USB /c (both 3.2) on my pc I can't get above 320 - 350 Megabits per second, from either phone. The same speed happens on the USB2 sockets too.

Ideally, I would like to use the z flip as a mobile dongle and my s23u for normal use.

USB2 has a max of 480mbps and USB3.2 has a max of 20gbps - google || Of course I don't know if that is any data type transfer or just certain types. However on the face of it, it should be working.

Any ideas ?

TIA

MistaB · 3 weeks ago

Had a Z Flip4 arrive today so tested that and as expected, usb2.0 so no change. Then I realised I now have the cable so I can check what the s23ultra can do and sure enough, it has USB 3.2 so tried it and sure enough, hit 600mbps (typical speeds today) alas I neither want to use the s23 as a MIFI and it keeps disconnecting the tether for some reason, randomly a few or 10 or so more seconds after successful connection and won't reconnect unless I touch the tether choice again.

However this does mean definitively we have a solution.

A USB 3.2 cable and socket will allow speeds above 320-350mbps, 600mbps on this test today. I expect more on better connection days.

Thanks for the replies.

View solution in context

MistaB · ‎09-04-2025

I have just realised this could be a USB cable issue. Like HDMI, certain cables are limited to certain speeds it seems. Something for me to consider.

arianwen27 · ‎09-04-2025

Going to start with some things.

No Samsung phone supports over 5 gigabits. So USB 3.0 (USB names have changed so many times they are now just the speed). So USB 3, 3.1, and 3.2 don't mean anything anymore. It's USB 5 gigabit, 10 gigabit, 20 gigabit.

If a USB 2 and 3 port on your PC both give the same speed, your phone is probably using USB 2 the entire time. Make sure you have a USB 3 or 5 gigabit-rated cable. Normal cables only support USB 2.

In terms of Windows numbers, USB 2 yes has a maximum speed of 480 Mbps, but for file transfer, realistic speeds are maybe 30 MB/s.

For your specific issue, it just sounds like you don't have a USB 3/5 gigabit-rated cable.

Numbers might be a little off as there are a lot of numbers so main focus is you got the same speed on usb 2 and 3. Meaning usb 3 isn't used. Cable usually at fault

MistaB · ‎09-04-2025

Hi and thank you for a fast response. As a result I have just ordered two 3.2 cables. One a/c and one c/c.

Again thank you. I will be back and mark this as the solution once tested.

arianwen27 · ‎09-04-2025

Hope it all works out. The cable that comes with phones is always usb 2. So most people don't realise and never actually get usb 3 speeds working

Qanon · a month ago

I bought a tp link router to put my sim card into to hotspot to my ps5 works really well and has doubled my speeds

MistaB · 4 weeks ago

@Qanon wrote:
I bought a tp link router to put my sim card into to hotspot to my ps5 works really well and has doubled my speeds

which one ?

MistaB · 4 weeks ago

@arianwen27 wrote:
Hope it all works out. The cable that comes with phones is always usb 2. So most people don't realise and never actually get usb 3 speeds working

I ordered two different 3.2 cables from ali and neither resulted in faster speed. Of course they could be fake but I doubt they are. I did a file transfer 472mb in 13.4 seconds and that showed as 290mbps.

Qanon · 4 weeks ago

This one

MistaB · 4 weeks ago

Turns out the z flips upto the z flip4 are usb (c) 2.0 so that's the blockage in theory.
See if I can stretch to a 5 which has 3.2

Thanks Qanon

High Speed Tethering to New PC

1 Solution