Hi, I have a problem that I suspect is an isolated situation, nevertheless, it has been bugging me for over a month now. Hopefully the community will have some insight.
I will try to report the problem in it's entirety:
I do have a shortcut on my desktop to Phone Info (*#*#4636#*#*). From here, the thing I note of interest is the CID, which I guess is the tower ID that my phone is currently connected to. Also of note here are the ASUs, which I'm not quite sure what they are, but they seem to correlate with the number of bars being reported (ie more asu = more bars).
I also use Hello IM (AIM app from the market) heavily, and I have "Show notification icon" enabled, so it works fairly well as a visual indicator of connectivity, or lack thereof.
Ever since I upgraded from Super D to an Eclair rom, I've had problems with 3G handoffs on Tmo. Basically, whenever my phone switches from Edge to 3G, or one 3G tower to another 3G tower (different CID in Phone Info), the connection times out. I see the infamous "up arrow but no down arrow" activity on the 3G icon in the notification bar. This happened just about everywhere I went.
About a month ago, I decided to upgrade the phone radio, from 2.22.19.26I to 2.22.23.02. For one reason or another, this completely solved my problem. I had no problems with handoffs, 3G just started working again.
A couple weeks ago, I downloaded CM6 and tried out Froyo. The first thing I notice is the weak signal on my radio. Before flashing the rom, I did a nandroid backup, and I know I had 3 bars of 3G signal where I set the phone down. After the flash, my phone had no 3G signal, and for some reason refuses to switch to edge; so my signal indicator is sitting there with an X over it. After some time, it finally does pick up a 3G signal--this is where it begins to get weird...
My 3G works right now, for the most part. There seems to be 2 very specific locations where it does not work. As mentioned earlier, I am able to check CID's through the Phone Info menu. I notice 2 CIDs where my 3G connection times out. By time out, I mean an apparent loss of data (ping doesn't work in Phone Info). This happens every time I am connected to these 2 towers. As soon as the phone switches off to another tower, data works fine again. The strange part is, even though I am not getting data, the asu and signal bars continue to move up and down as if I have a normal signal. The phone also makes no effort to switch back to Edge, even though 3G data is completely stalled (Hello IM shows as disconnected, ping fails).
This started happening since the CM6 update, and have persisted since then. Even after I did a nandroid restore back to my previous rom (Super E 1.02), the radio problem remains. Before CM6 and after I updated my radio, I had no problem connecting to these same towers.
In a nutshell:
3G does not work when I am connected to 2 specific towers since CM6 update
Phone makes no effort to switch to other 3G towers or Edge when connected to these 2 towers
When connected to these towers, signal strength continues to go up and down as normal; usually hovers at a consistent 2 to 3 bars with the stock signal indicator (4 bars max).
Currently I have tried flashing all the Eclair roms available, as well as my old Super D rom (still using 2.22.23.02 radio). Problem remains.
Does anyone have any idea what's going on?
Ok, first off my Vibrant has flat out awful reception.. fluctuates randomly between 4 bars and 0 bars on 3g and sometimes cant get more than 1 bar 3g in the middle of an HSPA+ city(Memphis). Its not a bar display problem, sometimes my speedtest shows download speeds as low as 150kbps. If that wasnt bad enough it takes forever to switch between 3g and edge, by forever I mean sometimes a full 60 seconds+ and if Im running a data using program (Pandora for instance) it sometimes refuses to switch at all... Is this a known issue or is it just my phone?? I know my G1 did not have these issues.
Try doing a master reset on your device.
If the master reset dosen't work, you might reflash the full stock rom from the android dev section. There's alot of people that have been reporting substantial increases in their reception and connection speeds.
And if you think it takes a long time to switch b/t 3g and edge, you ought to try owning an evo for a month. It takes FOREVA to switch the 4g radio on and off, at least 3 min for me, takes about that long to turn it on after a reset too.
Just because you're in a HSPA+ city doesn't mean you're on the HSPA+ network.
If you're having problems with it aquiring the 3G network try a new sim.
The G1 has mediocre reception but it is aided by the fact that the antenna is at the top and not the bottom like all other phones.
Bump,
I am actually having this problem too, I have tried a factory reset, I also tried reflashing the T-Mobile stock fimware, but it has not helped. I have good 3g and edge reception where I live.
Oh yeah, I am using ATT on the vibrant.
When this happens (ie. not switching between network or slow switch time), you can trigger airplane mode and then undo it and the phone will pick up the right network or switch network faster. For example, if use 2g network is checked, it will enter Edge, etc.
I see exactly what you guys are talking about, locking it on 3G will fix this right up. I was driving down the freeway and I KNOW I was passing 3G towers, but the Vibrant stayed on EDGE for way too long. I locked it on 3G and I never lost the signal and it was 4 bars for nearly all of the trip so I know 3G was there, it just wasn't switching back fast enough.
Looking under the Samsung debug mode, the Vibrant will hold onto 3G until -115 Recieve power, which is basically -115dBm under the Android network menu. Of course over -101 RSCP, it will show 0 bars so it's hard to know when reception is acutally really bad.
It should show -0 bars at -113dBm, 1 bar until -101dBm, 2 bars until -89dBm, 3 bars until -79dBm, and 4 bars until -51dBm.
just disable the extra frequencies from service menu and it will be super quick.
I'll try that, at any rate it should be remedied by Samsung.
mohitmoudgil said:
just disable the extra frequencies from service menu and it will be super quick.
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Click to collapse
Are you talking about locking it to 3g or something else?
ttabbal said:
Are you talking about locking it to 3g or something else?
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Click to collapse
I'm pretty sure hes talking about only having it on 1900/1700 (combi bands)
pyun said:
If the master reset dosen't work, you might reflash the full stock rom from the android dev section. There's alot of people that have been reporting substantial increases in their reception and connection speeds.
And if you think it takes a long time to switch b/t 3g and edge, you ought to try owning an evo for a month. It takes FOREVA to switch the 4g radio on and off, at least 3 min for me, takes about that long to turn it on after a reset too.
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Click to collapse
Does it matter if you flash from nandroid backup or oden?
heygrl said:
I'm pretty sure hes talking about only having it on 1900/1700 (combi bands)
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That's an unintuitive user interface. sheesh.
Looking at Wikipedia, it looks like TMO uses 1700/2100 WCDMA and 850/1900 GSM (2G/EDGE). There's also a WCDMA 1900, but according to what I'm reading, TMO doesn't use WCDMA signaling on 1900, just GSM/EDGE.
To try it, go to the service menu using the steps for 3G locking and select 1700 only instead of WCDMA ALL. Then go back using menu/back (not the back button) twice and go to Combi Bands and select WCDMA 2100. That should enable just 1700/2100 WCDMA 3G service. Turning on PCS 1900 does seem to get me an EDGE connection. Enabling GSM 850 ONLY gives me emergency calls only, so it might be worth keeping on for 911 calls. 850 goes further so it might have service when the others don't.
I don't get 3G service in my basement, for example, so I would like to keep EDGE enabled. Hopefully enabling just the bands that I would use will help keep the search times down.
JasonCook said:
Does it matter if you flash from nandroid backup or oden?
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Click to collapse
To really get a full re-flash, you need Odin right now. It should be possible to do it without Odin now, but I don't know if anyone has put together a stock ROM that way yet.
I didn't see any difference in speed/stability with the stock Odin flash, but others might have. It seems to depend on the network more than the local stuff.
Band IV 1700 includes 2100Mhz so you don't have to enable it. From what I can tell, no.. combi-bands doesn't do much for the slow 3G requisition. I'm just going to lock it on 3G when I'm not at home.
PaiPiePia said:
When this happens (ie. not switching between network or slow switch time), you can trigger airplane mode and then undo it and the phone will pick up the right network or switch network faster. For example, if use 2g network is checked, it will enter Edge, etc.
Click to expand...
Click to collapse
This didn't work for me. I would do this, and it would only work changing from 3G to EDGE. But, from when I would put it on use 3g, it would first change from airplane mode to EDGE, then take around 1 min to change to 3G.
mohitmoudgil said:
just disable the extra frequencies from service menu and it will be super quick.
Click to expand...
Click to collapse
How do I disable the frequencies? I can only seem to enable them.
Okay so i've got an aria rooted and flashed with the Liberated 2.2 rom. I've been using it for the past 3 months and I've noticed that I will go from full service while a phone call is comming in and complete signal loss when I answer it. I have set the phone on a table and watched the network signal strength go from -113 dBm and 0asu to -81 dBm and 16asu and vise versa. I have also noticed that when I lose signal my "H" for the data goes with it and service comes back a few seconds later very strong but showing "G". From there it will go to "E" then back to "H".
Could anyone explain this or have a better reason as to why this is happening? Maybe its just based on the connection where I live but I've used the app Antennas and the tower is about 1/3 mile away.
Any info or help would be awesome
Thanks
i'm not sure why this would happen outside of a poor bit of service where you're living.
i used the various roms for the aria and never had any sort of service loss issue.
as far as the icons switching around, e = edge network (2g), h = hspa (3g). when your phone drops its connection, it tries to reconnect as fast as possible, usually with edge, then after its strong it looks for the 3g connection.
I tried every radio in town but keep on having problems, i live in an area with low cell reception and each time I loose signal I have to reboot, my phone doesnt search anymore. Is it just me?
if you haven't already, try running it set to only use 2g networks, it tends to be more resilient to short losses of signal.
Yes, but what's the use then of my data plan, if I switch to 2g? Thanks for your advice, but I need another solution.
Well firstly you still have data at 2g its just slower. I used to have. 2g/3g toggle to quickly turn on 3g when needed.
Hey I've tried searching for a thread for my problem but didn't find anything so here it goes;
Still on the old radio, whenever I choose "LTE Only" on Phone Info. I get good signal (4G logo) for about half an hour, and then I notice a complete drop in signal. The phone simply doesn't work; no calls, no data, no sms...
Anyone familiar with this issue? Weirdly on the WCDMA signal I never have a signal drop (H+).
Basically I've never been successful in getting consistent LTE signal for an entire day since the purchase of this phone. Anyone know of a fix?
I'm on Telus in Canada so APN settings are the same as regular HSPA+
Thanks!
Bump. Any help or pointers would be highly appreciated!
Sent from my Nexus 4 using xda app-developers app
Use the LTE/GSM auto setting. LTE Only will only rely on a strong LTE signal, and not drop down to any of the other networks if it needs to. I use LTE/GSM auto and haven't had any problems with losing connection. It switches down from LTE to H+ when it needs to.
Maybe your carrier decided to cut off support for lte on nexus 4?
You could try reflashing the radio to see if it cures your problem.
What provinces are you guys in? Im trying to get LTE to work on my Nexus in Calgary and not having any luck so far. When i switch the the LTE/GSM signal nothing happens. Is there any other radio flashes that need to be performed to get the LTE signal.
Checked with Telus already, the V3 sim cards can do LTE.