Database Users

[Q] USB tethering

Is there a way I can USB tether my tablet to my phone? I believe 3.1 has USB host support, so if I got the USB adapter for my tablet would it be able to use it for internet? I don't want to buy the adapter before knowing if it's going to work.
The reason I'm asking is that I've always used USB tethering on my Evo 4G when tethering to my laptop, and I get great speeds. However, I tried wifi tethering for the first time today with my Galaxy Tab and found that download speeds won't go above 250 kilobits/sec, while upload speeds are 1.2Mbit/sec. From my phone the speedtest still shows 6-7Mbit/sec download speeds, which is the same that I get over USB tethering. Wifi tethered download speeds are also this slow when using my laptop. I tried disabling encryption and disabling CPU scaling (ie set min and max freq at 1Ghz) in case the phone was CPU bound, but it had no effect. The actual load on the phone was minimal during a wifi tethered speed test (3% usage). So there must be something wrong with wifi tethering on my phone.

Ingenium13 said:
Is there a way I can USB tether my tablet to my phone? I believe 3.1 has USB host support, so if I got the USB adapter for my tablet would it be able to use it for internet? I don't want to buy the adapter before knowing if it's going to work.
The reason I'm asking is that I've always used USB tethering on my Evo 4G when tethering to my laptop, and I get great speeds. However, I tried wifi tethering for the first time today with my Galaxy Tab and found that download speeds won't go above 250 kilobits/sec, while upload speeds are 1.2Mbit/sec. From my phone the speedtest still shows 6-7Mbit/sec download speeds, which is the same that I get over USB tethering. Wifi tethered download speeds are also this slow when using my laptop. I tried disabling encryption and disabling CPU scaling (ie set min and max freq at 1Ghz) in case the phone was CPU bound, but it had no effect. The actual load on the phone was minimal during a wifi tethered speed test (3% usage). So there must be something wrong with wifi tethering on my phone.
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<<would also like to connect tab to evo using tether ( my tablet sees it and displays "connected" but nothing loads in a browser.

[email protected] said:
<<would also like to connect tab to evo using tether ( my tablet sees it and displays "connected" but nothing loads in a browser.
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Hmm, I wonder if logcat and/or dmesg have any useful info. It could be an issue of the usb networking driver not being present, or it could be something simple like the tablet not using dhcp to ask for an IP or DNS server.

AC WiFi connection speed (slow)

Guys,
I have an Active but its probably the same for the regular S4.
I was just transferring a bunch of music files to my phone wirelessly and I was shocked how slow it was.
I just got under 2MB/s on a 72mbit link with WPA2 AES encryption.
I had full bars connecting to a Asus AC66U router.
I thought AC wifi is capable of almost gigabit speeds.
How do I see if my phone is using N or AC? Is there a way to force an AC connection.
Anyone else have the Asus AC router?
Can you post your speeds.
Thanks
Oli

Ok, figured it out. It was connecting on the 2.4 GHz, had to get it on the 5 GHz. Now getting 433Mbit connection

Slow WIFI Transfer

Hi,
I would like to ask if it's normal to have <1MBps wifi transfer rate on my Galaxy S4. I'm trying to transfer a movie file from my phone to my PC (gigabit-lan) via my TP-LINK N750 router.
I checked my phone and it's currently connected using 2.4Ghz spec with 72Mbps linkspeed. Theoretically.. the wifi transfer speed should be around 8MBps not <1MBps.
Any clues why my transfer speed is slow? My forte is more on network stuffs so I'm not really sure if my phone is causing the bottleneck here or not. See attached for reference.
Thanks guys!
Sent from my GT-I9505 using XDA Premium 4 mobile app

I have the same issue across several different ROMs and modems. Laptop with external HD is connected to router with gigabit LAN, phone connected to router via wireless-N and I get roughly 1mbyte/s. However download speeds with my phone via WiFi is roughly 8 megabyte/s (fiber optic) so I know higher speeds are possible.
My other desktop PC achieves around 11-12megabytes through WiFi but my phone just gets nowhere near it.
Odd thing is when I stream videos to my phone though my WiFi from a hard drive the phone buffers at well over 5megabytes/s but file transfers are somehow limited... I could never figure this one out

Swizzy88 said:
I have the same issue across several different ROMs and modems. Laptop with external HD is connected to router with gigabit LAN, phone connected to router via wireless-N and I get roughly 1mbyte/s. However download speeds with my phone via WiFi is roughly 8 megabyte/s (fiber optic) so I know higher speeds are possible.
My other desktop PC achieves around 11-12megabytes through WiFi but my phone just gets nowhere near it.
Odd thing is when I stream videos to my phone though my WiFi from a hard drive the phone buffers at well over 5megabytes/s but file transfers are somehow limited... I could never figure this one out
Click to expand...
Click to collapse
Thanks Swizzy!
I also noticed this.. somehow I thought it was because of my router. So I decided to buy 450Mbps Dual Band router to test it. Unfortunately, it is still capped @ ~1MBps transfer rate even I used the 5Ghz spectrum

Complain to google
I have done some testing with a fast windows 7 system as the target and a Nexus 5 and an xperia neo v. I have also tested with XP and Linux smb clients. Basically the maximum I get get with stock 4.4.2 or 4.0.4 is about 4.5 Mbps (550KBps) pull down and 9Mbps push up. Wifi is 11g and XP gets 15 down and 19 up. openSUSE linux gets more or less the same as XP. The problem exists with ES Explorer and File Manager. I tried SFTP into linux with ES Explorer and that was a little slower. The standard USB transfer from windows explorer is really fast to the N5. This looks like a design or configuration problem in android 4. Complain to GOOGLE.
I am glad I found this just before I spent a lot of money on an ac router to speed up large wifi file transfers

So a device running pre version 4 should not have the limitation?

I have a Galaxy S4 with the newest firmware from samsung I9505XXUGNF1 (Kitkat 4.4.2). My router is a Asus RT-AC66U to which My S4 connects to with max speed of 433 Mbps. My internet connection is 120 Mbps.
When I do a speedtest on the S4 I get results of over 110 Mbps, but when I'm downloading a file over LAN from the disk connected directly to the router I get download speed only of ~20Mbps (2.4 MB/s) which is very sucky!
My Laptop have only a N network card, and connects to the router with max 300 Mbps and when I download the same file I get over 7.5 MB/s!! (~65 Mbps).
Speedtest also shows results of over 110 Mbps...
I remember when the phone was new, and it had Android 4.3, I had LAN download speed of over 9-10 MB/s...
I tried with different file managers like X-Plore and others, but it looks like it is not the app problem. Maby is a KitKat problem??

In short blame Broadcom or Samsung for using Broadcom BCM4335's BCM4335 wifi chipset. You need to understand how 802.11n works. To achieve 300mbps speed, you will need 2-3 spatial antennas which can be found on modern laptops with Intel Wifi chipset (such as 6300). Our galaxy note has only one antenna (should be 1 for each radio band (a/n, b/g/n), but it is "N" compatible. Unfortunately this is a case of the manufacturer misleading it's customers ( I would say out right lying to us). Its is compatible with N, however it can not support N speeds, as far as I have seen all phones that claim 802.11n are actually limited to 65mbps. So really are not 802.11n at all, rather just a little faster than 802.11g.
part of the problem is the maximum number of data spatial streams the radio can use. Also assuming equal operating parameters to an 802.11g network achieving 54 megabits per second (on a single 20 MHz channel with one antenna), an 802.11n network can achieve 72 megabits per second (on a single 20 MHz channel with one antenna and 400 ns guard interval); 802.11n's speed may go up to 150 megabits per second if there aren't other Bluetooth, microwave or WiFi emissions in the neighborhood by using two 20 MHz channels in 40 MHz mode. If more antennas are used, then 802.11n can go up to 288 megabits per second in 20 MHz mode with four antennas, or 600 megabits per second in 40 MHz mode with four antennas and 400 ns guard interval. Because the 2.4 GHz band is seriously congested in most urban areas, 802.11n networks usually have more success in increasing data rate by utilizing more antennas in 20 MHz mode rather than by operating in the 40 MHz mode, as the 40 MHz mode requires a relatively free radio spectrum which is only available in rural areas away from cities. Thus, network engineers installing an 802.11n network should strive to select routers and wireless clients with the most antennas possible (one, two, three or four as specified by the 802.11n standard) and try to make sure that the network's bandwidth will be satisfactory even on the 20 MHz mode.
Data rates up to 600 Mbit/s are achieved only with the maximum of four spatial streams using one 40 MHz-wide channel. Various modulation schemes and coding rates are defined by the standard and are represented by a Modulation and Coding Scheme (MCS) index value. The table below shows the relationships between the variables that allow for the maximum data rate. GI (Guard Interval) : Timing between symbols.[6]
Refrence: http://blogs.intel.com/technology/2010/02/the_black_and_white_worlds/
reference: http://en.wikipedia.org/wiki/IEEE_802.11n-2009#Data_rates

I see similar speeds on my S4 when doing wifi transwer. varies depending on which network i am on and what I am transferring to.
still faster than crappy USB connection..

@XeoNoX thank you for educational lesson.

WiFi Powersave mode
You may check if the WiFi power save mode is on. If it is on, you may turn it off and check if the speed improves.
To enter Service Menu, open dialer and press *#0011#
In the service menu, select menu > wifi
check if the WiFi power save mode is on or off. Turn it off.
If it was off, then you've wasted your time trying this

WiFi Low transfer speed over LAN

My Galaxy S4 have the newest firmware from Samsung I9505XXUGNF1 (Kitkat 4.4.2). My router is a Asus RT-AC66U to which the S4 connects with max speed of 433 Mbps. My internet connection is 120 Mbps.
When I do a speedtest on the S4 I get results of ~110 Mbps, but when I'm downloading a file over LAN from the disk connected directly to the router I get download speed only of ~20Mbps (2.4 MB/s) which is very sucky!
My Laptop have only a N network card, and connects to the router with max 300 Mbps and when I download the same file I get over 7.5 MB/s!! (~65 Mbps).
Speedtest also shows results of over 110 Mbps...
I remember when the phone was new, and it had Android 4.3 (~10 months ago), I had LAN download speeds of over 9-10 MB/s...
I tried with different file managers like X-Plore and others, but it looks like it is not the app problem.
does somebody know what could be the problem?

Same problem on Galaxy Tab S (SM-T805)
The same is happening to my Brand new Galaxy Tab S.
It is connecting to the WiFi with 866Mbps, and files inside the network are download only at ~3 MB/s
does anybody have the same issue?

The problem is now solved by installing newest version of X-Plore v 3.66 https://play.google.com/store/apps/details?id=com.lonelycatgames.Xplore
LAN download speeds went from ~2.5 MB/S to ~14 MB/s (I think that the limit is now the Hard Drive plugged to a USB 2.0 port on the router)
Thank you Lonely Cat Games for solving this issue!!

Slow wifi speeds on Shield TV 2017

Just got the new shield tv box and my wifi speeds are incredibly slow. Get 100 mbps on all my other devices, but 5 mbps.
Anyone know of a solution?

i have exactly the same problem on 2.4ghz wifi. i even put the router right next to the shield tv. still only 6-10mbit (max. 15mbit) while i have a 100mbit connection from my provider. on the 5ghz wifi i get about 60mbits but on both i have huuuuuuuuge packet loss every 3-7s. makes gamestream impossible :/
i even bought a new router. tried with my standard fritzbox 7390 and now with a new linksys wrt1200ac. results are the same slow and bad connections to shield. everything else (i.e. notebook, smartphone, pc) works just fine...

Unplug any peripherals connected via usb and try again. This means wireless mouse, usb hub, etc.
I've found the only way to get consistent speeds with the shields wifi is to use a usb hub that has it's own power source.

Can confirm. Having an extremely hard time streaming anything in 4K on Netflix. 350 mbps Download and 30 mbps Upload. Netflix network speed test shows like 29 mbps... I installed a browser and went to Fast.com and get about 80 mbps. Downloaded the "Fast" app on my Pixel XL and immediately got 250 mbps down standing in the same room connected to the same 5 GHz Wireless-AC network. Amazon Prime eventually decides to stream in UHD and HDR, but it takes a while. Youtube, oddly enough, streams in 4K almost immediately.
Router is an ASUS RT-AC1900P.

I'm still having issues. Has anyone solved this problem?
There was an update recently and the performance in Plex seemed to get a little better, but high quality videos still stop and buffer.
Are there any debug tools on the shield that could be used?

Ok so I had terrible performance on 2.4ghz. on 5 GHz it only connected once so decided to have a look at my modem settings and tweaked it.
Have it set to
802.11a/n/ac mixed
Channel auto channel 112
20/40/80 MHz
Everything working smoothly now with no dropouts

I'm having the exact same issue with my new 2017 Shield. If I restart the Shield, it will occasionally work at full speed on 2.4 OR 5 Ghz. But most of the time, it's under 10 mbps - transferring from the internet OR from my PC that is hardwired to my router. I already had an RMA done, and I'm having the same issue with the new Shield NVIDIA sent me. I've tried every channel possible, used tools to find the proper channel, etc. Same slow speed. None of my other devices have the same issue, even in the same location. Nothing is attached via USB.
What's the deal? Any solutions?

Having problems as well. I have my wirless router I'm a good distance running 350mbs and I can pass the test for the games. When I try to play the games they instantly show I'm having wifi problems.