Mobile network connection constantly fails on low signal - Galaxy S III Q&A, Help & Troubleshooting

When I have one bar of signal its pretty much impossible to do anything online and with a 2 bar signal it can be hit or miss, browse the web, update apps, use a tether etc, the connection to the server just fails.
Using my old LG GT540 I could do anything online with a low signal although it was a little slow, I was wondering if anyone else had seen this, and if they have is the cause known, it could be my network I'm just trying to work out if its the phone.
It can show a HSDPA signal but data just doesn't get transmitted, I have also seen the HSDPA signal completely drop out before now with a 1 bar signal. Also has anyone seen it before the LFB update, but haven't after the update?

Related

Hero WiFi icon not working properly

Areet,
I've searched all over and cannot find any info on this problem. My WiFi icon only ever shows one bar, even when my phone is literally sitting ontop of my router. It's the same on the six other routers I have connected it to. I get great signal strength and data speed, but the icon never shows more that the one bar.
Anyone else got this problem?
Cheers,
BS...
http://forum.xda-developers.com/showthread.php?t=548607

Can never download with 3g

I don't seem to have any major issues downloading and browsing when not connected to a wireless network, but I have noticed that I only ever seem to be able to connect through HSDPA, Edge (I think) or G. Whenver 3G is showing, the progress bar always hangs, before switching back to H and then continuing. So far I have never seen anything download via 3G.
I am confused. Why might this happen?

Mobile Data Connectivity Issues

My Amaze is having some serious Mobile data (4g/2g) connectivity issues. The problem is this:
1. When turning the screen on, the notification bar shows no mobile data connection, regardless of how many bars I have. Mobile data connection is always enabled under quick settings, but for some reason the phone still can't establish a connection for quite some time, or until toggling mobile data on/off a few times.
2. After finally getting a connection, the phone has further problems connecting. Even though 4g/3g/2g icon is present on notification bar and mobile data is enabled in quick settings, using browser will return only "page not found" errors, and apps will not function properly due to them not having a network connection (foursquare and spotify most especially). Looking at the 4g icon on the notification bar, I can see the "up" arrow flashing as if the phone is sending data, but the "down arrow" is dead as a doornail, not lighting up or receiving anything back. This happens regardless of how many bars I have.
3. On the rare occasion that the phone's mobile data connection does work, it's super slow and acts more like 2g than 4g. Simple web pages take anywhere from around 30 seconds to a minute to load, and spotify cannot stream a song without having to buffer constantly.
Does anyone know how to fix this issue? Or had experience with it? Just in case your wondering, I haven't gone over my 5gb data plan yet (see attached image).
Issue resolved.
Apparently this problem is a combination of 2 glitches:
1. When upgrading to a new phone, despite how much data you used in your plan during the billing cycle, on the T-Mobile My Account website, the widget which shows how much data you've used will only reflect the data you've used on the currently activated device. Before I upgraded to the Amaze, I had exceeded my 5gb limit on my Nexus One and was being throttled by T-mobile to lower speeds. My next billing cycle doesn't start until Dec 27th, so despite the fact that I've only used about 70mb on my new Amaze, the 6 gb I already used on my Nexus One still counts for this month's billing cycle even though the T-Mobile website doesn't reflect it.
2. When throttling, the Amaze, which by default is set to WCDMA/GSM auto, is supposed to automatically switch itself off of 4g and only allow 3g/2g connections. It doesn't. For some reason, it stays with the 4g connection even though the connection is, at best, intermittent. This is the cause of the "page not found" errors and app network errors I was having.
So, for anyone else who is wondering how to remedy this, the fix is simple. Go into Settings>Wireless & Networks>Mobile Networks>Network Mode, then tap "GSM only". This will cut off the problematic 4g connection while still allowing for 3g/2g connections. While noticeably slower (especially where I live, since the Florida panhandle only has 2g and 4g, no 3g), the mobile data connection is solid. Have yet to have any connection errors or experience any intermittency. Still, can't wait until the 27th when I can test out the full power of the 4g connection.

[Q] Problem with running apps when leaving WIFI zone

I'm having an issue that has been bothering me. I run Etrade Pro with streaming data and charts, and when I leave my home, it does not automatically cut the wifi and switch to LTE or 4g. My app stops and says there is no data. This has happened a lot and I wonder if there are some settings that need to assure that mt cell signal automatically kicks in when Wifi cuts out.
ANother problem is that if I approach an area where there is wifi, the phone connects, and i usually get a data issue again.
I also got the same problem when i stream a video while on wifi and then leave the wifi zone, so I know it is not an Etrade app specific problem,
Any advice would be appreciated. What I am having to do is manually shut off wifi and then restart the app when the 4g kicks in, and I know the phone is designed to handle this for me.
lindenhurst said:
I'm having an issue that has been bothering me. I run Etrade Pro with streaming data and charts, and when I leave my home, it does not automatically cut the wifi and switch to LTE or 4g. My app stops and says there is no data. This has happened a lot and I wonder if there are some settings that need to assure that mt cell signal automatically kicks in when Wifi cuts out.
ANother problem is that if I approach an area where there is wifi, the phone connects, and i usually get a data issue again.
I also got the same problem when i stream a video while on wifi and then leave the wifi zone, so I know it is not an Etrade app specific problem,
Any advice would be appreciated. What I am having to do is manually shut off wifi and then restart the app when the 4g kicks in, and I know the phone is designed to handle this for me.
Click to expand...
Click to collapse
I'm not sure this is something we have control over, I was reading over a white paper qualcomm wrote on the matter: http://www.qualcomm.com/media/documents/files/3g-wifi-seamless-offload.pdf
Our phone is 3GPP R8 however, I'm not sure at&t's network supports dual stack mobile IP, so therefor the handoff between wifi and 3g would have to interrupt data.
WHat bothers me is that I just came from an Iphone4 and the iPhone switched from wifi to cell, and my Etrade App kept running. There may have been a momentary lag, but i didn't have to close the app and start it again.
Let me look into it more when I get home. At work youtube is blocked on the company network so I can't test if a video continues between handover here.
WHen I leave my home and know that I am out of wifi range, I still see the wifi symbol on the home screen but it looks like there are no bars of strength. It's like the thing is still trying to draw data through wifi that is well out of range.
Frustrating.
lindenhurst said:
WHen I leave my home and know that I am out of wifi range, I still see the wifi symbol on the home screen but it looks like there are no bars of strength. It's like the thing is still trying to draw data through wifi that is well out of range.
Frustrating.
Click to expand...
Click to collapse
So if the wifi symbol is on the status bar that means the phone is still connected to the wifi (or at least thinks it is).
I was not able to reproduce your problem with youtube when I was home. I started a video on wifi in my home, and then walked out the front door and down the hall until it lost the connection, the wifi symbol disappeared and it just had to re-buffer a little bit after it switched to LTE then the video continued.

Slow Network with 3G - H

I found out, if i have bad Network, the Phone stays in it. For example, at work i have a Zone were only "H" is available and very slow. Phone shows 3G and i have 15KB/s DL Speed, wich is not really usable.
If i move to a Zone were it is better Network, it still stays in "H" and i still have only 15KB/s DL speed. But, if i set my Phone in flight mode and back, then i have "H+" (Phone shows still 3G - wich is normal) and DL Speed increases to over 4-5 MB/s and more...
I think there´s a problem with Network Selection, so Phone does not immedialy take the fastest Network, it stays in slow until the user makes a manually reconnect with flight mode of on or like you described with choice of Networks.
This is really disturbing, because at work i always have to set flight mode on and off and wait till connection and then its possible to surf in the internet etc..... before its so slow that you wouldn´t really enjoy surfing in the internet...
Anyone has a solution or a fix for this?
Its really annoying all times to switch flightmode to have usable internet...
No Idea anybody or a tweak?

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