[Galaxy Tab S Q&A, Help & Troubleshooting] Claw22000:
Possibilities...

I have had my Tab S 10.5 for about 1 month now. I'm running it Rooted Stock Rom and Kernel. I do not see any lag that people are complaining about. Everything is smooth as heck. I do wonder why some people see it and others don't. I have a possible reason for this.

I am a Network Engineer (Or was). Even though I do not use this skill at work anymore I do spend a fair amount of time on it at home. I have 3 separate wireless network configurations in my home so I can do testing.

Environment 1: B/G Distributed network across 3 routers to make a huge area for basic wifi usage around the block.

This network suffers from lag because of the bandwidth being halved to support a larger area. You might find these kind of networks on campuses, Hospitals, Business, warehouses and the like. The main router supports the larger network and might even have second tier connections to extend it further (which halves it a second time or aka 1/4 speed). When close to the main router your wireless will use the main router and give you better bandwidth. If the network is crowded or poorly configured it will behave slowly and produce lag no matter what you do.

Environment 2: Straight Standard Cheap Linksys B/G/N Router. What Most people have in their homes.

This network can differ based on the surrounding area. CONSIDERABLY! If this is you I would recommend you get the WiFi analyzer app. Play Store Link FREE! This will show the usage levels of the channels in your area. The more people on the same channel the lower your bandwidth and the more lag. Sometimes simply moving the channel your wifi is on can make a nice loading time difference. Keep in mind the channels bleed in to eachother so when looking at the screen you will see that demonstrated by the lines displayed in the First screen (Channel Graph). If your lucky there will be a decent game somewhere in the channels so you don't get interference while using it. Keep in mind that there are other devices that can interfere with your reception as well. They might not affect your signal bar. Microwaves, Baby monitors, Ip Cameras, Bluetooth, Wireless anything, etc. After choosing a different channel open wifi analyzer back up and watch the channel graph again. Go to settings and turn up the scan interval. This will allow you to walk the perimeter of your home and see where the dips really are and where interference comes from. You might take a wile to find the best setting (Least crowded or interfered). Keep in mind the signal meter on the tablet and the wifi analyzer will not show non-wifi interference. You will just notice on the channel graph that the signal goes down. Basically it might not be apparent why the signal goes down. Just be aware that if this happens you might not have options to change why that channel is a bad choice. Examples are neighbors devices (baby monitors, Roku's and the above mentioned stuff)

Environment 3: High Performance AC Router.

After much reading and research I concluded on this router for my AC experience. AC has much less range because of the 5Ghz band. However it allows for a much greater bandwidth with in the working area. This band is also less crowded so you will see in wifi analyzer there is much less crowding. I'm lucky enough that on my block I'm the only one that has this. 5Ghz is not bothered by microwaves, baby monitors, Bluetooth and the like. While on this network there is almost no waiting on YouTube, Netflix, chrome, etc. The only time I notice any lag is when all 5 people are using connections (3 tabs, 5 computers, Roku, etc) That lag comes from the tax on my 30Mb internet and not the hardware delivering it to the devices. If your internet is slow you cannot fix it with a faster router. A great way to test your internet speed is through PC and Android App. This will help to determine where you lag really comes from. For people that do not like the DD-WRT or open sourced Firmware you might want this one instead. Link. This router comes with the stock Firmware installed is if you choose to move over to DD-WRT you may do so later at the cost of your warranty.

I hope this will help some people sort out there issues. I am in no way an android expert. I just love my device and have been fortunate not to have any major issues as of yet. *Knock on wood*. I also run a PfSense box so I can control my network better as QOS isn't good enough for me. I also like the control you have on your network for security, access, blocking, etc If you want to play around with this its free and available at This Site. This is a OS for PC so you will need an old computer and a second network card for it. You can see instructions as wells as hardware requirements on the site.

I don't often get to contribute to the scene and love all the help I get so when I get a chance like this I try to do what I can. If you like the info please click thanks as I don't get to many of these changes.

DrClaw