slow 4g - T-Mobile, Samsung Galaxy SIII

For the past few days my data has been real slow well when downloading it starts off at good speeds but after a few minutes it slows down big time and for it to go back to normal i have to switch off my data then on and repeat that process any ideas what it could be or how to fix it cled tmobile support they were no help thx

Give a little more info
Are you rooted?
If so, are you running stock?
Custom rom name if any
Baseband version?

Yes im rooted running wicked v10 tmobile baseband version t999uvlh2
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Well, how much data have you used? You could be getting throttled especially if you've used lots of data in short amount of time.
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bigfnfil said:
Yes im rooted running wicked v10 tmobile baseband version t999uvlh2
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Click to collapse
And you have the unlimited data plan i assume?

Yes im on the unlimited plan and not sure about the throttling would have thought the tmobile rep would have mentioned that if that was the case
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bigfnfil said:
Yes im on the unlimited plan and not sure about the throttling would have thought the tmobile rep would have mentioned that if that was the case
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Click to expand...
Click to collapse
T999UVLH2 is your baseband version. Then i would try flashing the T999UVDLJC baseband and test it out.

There is a new mdm5 baseband out. Im sure you cant search and find it here.

I flashed wicked v10 on my friends tmo s3, were getting slow speeds as well. Gonna try a different radio
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I have the same problem in a certain part of Seattle where my hspa+ speed is around 4 - 10 kilobytes per second download..
Guess to many people using it

I don't think it's the rom itself. Try a different modem and report the findings. I'm on Wicked v10 in souther cali with latest modem and I'm getting great speeds. Can it be on tmobile end updating/refarming towers?
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Yeah i dnt know wat is wrong with it its been a few days now and same thing when i run a speedtest i get geood speeds but as far as downloading anything it starts good then goes down to like 650b and downloads always fail thx for the help tho
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Have you tried any of the other modems?
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No kind of new at this wouldnt no were to start open to any suggestions tho thx
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Click the link for Basebands/Modems thread in my sig. All flashable modems and a plethora of info about them is there.
Feel free to ask if you have questions. The thread is stickied in development if you need to find it later.
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Wow I was just trying to find out if others are having the same problem and Bam I see this. My download speeds start high then go slow. Hopefully it's the modem
I noticed it didn't start until I used the new T999UVDMD5
Edit: nope tried other modems and problem is still there
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Do you get different results during different times of day? Could be network traffic. Or if they're doing work on any towers it could also cause problems like that.
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DocHoliday77 said:
Do you get different results during different times of day? Could be network traffic. Or if they're doing work on any towers it could also cause problems like that.
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Click to expand...
Click to collapse
Indeed tmobile is upgrading their hardware and adding towers now that their LTE is spreading to more cities. Also since the merger didn't go through with At&t they are upgrading to compete in general.
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No same results at any time of day and i also noticed it did start happening until i flashed the t999uvdmd5 but since then used different ones but same results
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Call support to see if they are working on the network in your area.
If not, try the other modems in my baseband thread.
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Related

Verizon jellywiz on t999

Im sure some one else is running this on our phone.I flashed it and has given me pretty good batery life. jb stock roms we have are great but I had to try this.apn was a bit difficult to set after that all good
Ummm...... what?
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Wait what ?
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So just curious u were able to flash a Verizon rom on your tmobile s3. Didn't have to change anything besides the apn?
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That's what it appears he is saying.
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Wouldn't be too surprising really. Aside from slightly different radios, aren't all the US variants (canadian too) virtually identical hardware-wise? It would stand to reason that they would carry the same partition layouts as well.
Though I wouldn't go flashing away without verification of that!
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My thoughts at least, I flashed a few at&t roms with no issues besides build.prop stuff. I'm with you on not flashing things though lol.
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Yes the baseband stayd the same .I was pretty excited been using it for a week.battery life is good screen is on top of the list then system.so far beside using hiapn for apn settings it has been really stable one or two reeboots that I can remember from restoring youtube a delete and market install fixed that.
How did you bypass the verizon network verification?or did it not say registering on the verizon network? I have flashed many Att, Sprint, and verizon roms, but most(if not all) of the verizon roms have a built in verifyer for their specific network.

[Q] Will I bricking my phone

I want to install the official UVDLJA T-Mobile Rom on my Galaxy S3 and then install Frosty Jb. I have the T999v of Videotron one. Will my phone gonna be bricked or not? And my network gonna work also?
Thank you
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You're doomed bro. Turn back immediately.
Should be fine as long as you dont change your modem. I suggest you use mobile odin and unselect the modem. I did this with my t999v wind mobile and its fine.
I asked the same question with similar responses. But could those that had success maybe give a bit more detail on how they managed to odin the TMO stock? It passes the md5 but then fails when flashing, I have flashed numerous times in odin with no problem. Maybe an obvious requirement I am not aware of (stock recovery stock download or some such thing)
Thanks for the answer. I have another question. Before I turn to Frosty, my mobile network was only 3G and H+ but now with frosty, its only the 4G icon. So with frosty im on real 4g or its only a "fake" icon?
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Idyar said:
I asked the same question with similar responses. But could those that had success maybe give a bit more detail on how they managed to odin the TMO stock? It passes the md5 but then fails when flashing, I have flashed numerous times in odin with no problem. Maybe an obvious requirement I am not aware of (stock recovery stock download or some such thing)
Click to expand...
Click to collapse
Used Mobile Odin and de-selected MODEM and RECOVERY worked great. Thanks for the tip!
xxjack3dxx said:
Thanks for the answer. I have another question. Before I turn to Frosty, my mobile network was only 3G and H+ but now with frosty, its only the 4G icon. So with frosty im on real 4g or its only a "fake" icon?
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Click to expand...
Click to collapse
T-Mobile has no real 4g. Some roms are coded to just show E and 4g for 3g, H, and H+, while other roms break it down more
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bfranklin1986 said:
T-Mobile has no real 4g. Some roms are coded to just show E and 4g for 3g, H, and H+, while other roms break it down more
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Click to expand...
Click to collapse
I get up to 25/Mbps faster than my girl friends LTE hox at least that's my experience with speed test and real world usage
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md1008 said:
I get up to 25/Mbps faster than my girl friends LTE hox at least that's my experience with speed test and real world usage
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Click to collapse
Are you on stock?
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So OP your currently running frosty jb ?? I have a videotron whit vlalh2 and im pretty sure its incompatible ?
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Help, no 4g, horrible 3g

For the love of god, someone please help after I explain wth is going on.
Ive been running Infamous Rom for a while & a few days ago, my 4g startef acting up. I tried a different rom but no real change. I went back to Sonic FreeGS3 which had previou as ly ran fine but my 4g still sucks. Most apps are ok but Play Store & my web browsers refuse to load 9/10 times. I tried flashing UVLI6 & 5 modems but nothing. Do you guys think my 4g antenna went out? My wifi works flawlessly.
I live in NYC & most people had said UVLI6 was great here but not for me. Please help
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Did you check your imei?
Settings, about device, status.
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Still got my imei, flashed a different modem late last night & so far so good. I had the same problem with my wifes phone after I rom'ed hers but I restored it & it was fine after. I guess T Mobile changed something and I was on the wrong frequency to get a signal.
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Maybe you're in an area that was recently refarmed/upgraded.
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Im in brooklyn ny so its possible. I used a trick I saw online about keeping the ohone in wcdma only & that had worked from the day after I made this post til now. Is there an updated radio available or would I have to flash back to the latest stock rom? This is really starting to annoy the hell out of me
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All modems are avail thru link in my sig.
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Same thing has been happening to me. I'm in the upper Manhattan area and getting really poor 4g in my apt, like 1 or 2 bars, and dropping to 2g. I started noticing it yesterday. I'm calling T-Mobile tomorrow to see what's up.
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Sounds to me like they may be doing maintenance or upgrades.
Call T-Mobile though and they should be able to tell you for sure.
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New Modem needed

Im using my phone in Egypt and was struggling to get a network signal. Im currently running Baseband i317UCAMA4. What do you recommend I should install. Can i use the modems from the N7100?
You can try MC3 modem is in the One stop shop... in the modem section...
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Bajanman said:
You can try MC3 modem is in the One stop shop... in the modem section...
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I tried the MC3 today. After installing I was able to pick up a weak signal but as soon as I walked around the house the signal dropped. At the office i had a better signal using the old modem vs MC3. I think I will try the one for t mobile. Thxs
Sherio1000 said:
I tried the MC3 today. After installing I was able to pick up a weak signal but as soon as I walked around the house the signal dropped. At the office i had a better signal using the old modem vs MC3. I think I will try the one for t mobile. Thxs
Click to expand...
Click to collapse
Ok wait try what from tmobile?:what: There modem?? Very very bad idea if you have a AT&T GN2 I317!! That's a no no!! Don't ever cross flash modem!
You end up with PROBLEMS
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Bajanman said:
Ok wait try what from tmobile?:what: There modem?? Very very bad idea if you have a AT&T GN2 I317!! That's a no no!! Don't ever cross flash modem!
You end up with PROBLEMS
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Click to expand...
Click to collapse
Bajanman,
You saved me several hours. I will download the older ATT modems and see if that works.
I tried one of the old modems and got the same results. I continue to get varying degrees of signal strength. I saw some people saying this could be a hardware issue , any ideas.
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Sherio1000 said:
I tried one of the old modems and got the same results. I continue to get varying degrees of signal strength. I saw some people saying this could be a hardware issue , any ideas.
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Click to expand...
Click to collapse
That could possibly be it.. could be hardware based problem.
But first what modem do you have now?? J2 is the first one
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Sherio1000 said:
Bajanman,
You saved me several hours. I will download the older ATT modems and see if that works.
Click to expand...
Click to collapse
Not just several hours.. He may have saved you from ending up with a brick
Bajanman said:
That could possibly be it.. could be hardware based problem.
But first what modem do you have now?? J2 is the first one
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Click to expand...
Click to collapse
Bajanman,
I tried all the modems available for ATT with the same results. I have a very weak signal especially indoors and depending on where I am it improves. What kind of hardware problem do you expect to be the problem? Is there any way to check this?
Thxs

[Q] No service at work. Any help?

Ive noticed since I moved offices, that in my office building I get absolutely no service whatsoever. And there is no wifi password available to use wifi via my phone. So today as I was leaving work and finally got service again, I had 12 missed calls, 5 texts, and 3 voicemails. Is there a better modem to flash that can help? Thanks!
Not exactly. Different locations have different best modems. You just have to try them and see.
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Could anyone suggest an updated modem, or one they have had luck with if they are from the Chicago-land area?
You could check the map in the modem thread too. I know its a jumbled mess now, but the info can still be useful.
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yeah, i was trying to find my way through it but it is difficult so it hasnt really helped
K. Sorry bout that. Ill be redoing everything in it soon though.
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Do you think you could message me about what modem/radio might work better once that forum is sorted out? It really sucks not being able to use my phone at work for 8 hours. Thanks
I may not be able to unfortunately. I messed around a little before and got nowhere. May have to start a new map.
Have you checked T-Mobiles coverage map yet? There just may not be a signal there in the first place.
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DocHoliday77 said:
I may not be able to unfortunately. I messed around a little before and got nowhere. May have to start a new map.
Have you checked T-Mobiles coverage map yet? There just may not be a signal there in the first place.
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Click to expand...
Click to collapse
I never had a problem with my Blaze there. Even at home with the S3 I get maybe 2 bars. Which leads me to believe its the modem. On my Blaze I had an updated modem that made data very fast.
Can I use UVLI6 which is a 4.1.1 modem on a 4.1.2 rom I am currently using? Would that be compatible? i cant remember which way compatibility goes :/
Any modem, any rom, any build. Only make sure you use the right models modems, which it sounds like you are
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itsLYNDZ said:
Can I use UVLI6 which is a 4.1.1 modem on a 4.1.2 rom I am currently using? Would that be compatible? i cant remember which way compatibility goes :/
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Click to collapse
It will work, but last time I did that I wasn't able to connect to hspa or hspa+ only umts.. If it gives you signal though I guess its better than nothing
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itsLYNDZ said:
Can I use UVLI6 which is a 4.1.1 modem on a 4.1.2 rom I am currently using? Would that be compatible? i cant remember which way compatibility goes :/
Click to expand...
Click to collapse
You can use any modem version as long as it's specifically for your phone.
itsLYNDZ said:
Can I use UVLI6 which is a 4.1.1 modem on a 4.1.2 rom I am currently using? Would that be compatible? i cant remember which way compatibility goes :/
Click to expand...
Click to collapse
And just in case for some reason you need to hear the same answer a 4th time, yes you can do that! LOL!
serio22 said:
It will work, but last time I did that I wasn't able to connect to hspa or hspa+ only umts.. If it gives you signal though I guess its better than nothing
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This is just strange... in roughly a year of doing this I think you're the first to report that happening. 4.0.4 and 4.1.1 modems have always worked on 4.1.2, and any other combo has worked as well. There are people who still use the LH2 (ics) modem because it still performs better than any other for them.
I think you may have been seeing it function normally though. When idle, its supposed to drop to UMTS to save power and bandwidth. If you check while a transfer is occurring you will see it change to HSPAP.
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Has anyone else found another modem that they now use that gives them better signal/data speeds for their Tmobile T999? My work building is a complete dead zone for Tmobile, so I am hoping flashing another modem works. Otherwise, im not sure what else I can do.
I have to refer you to my initial response here. A modem that gives better speed and signal for me, might be one of the worst for you.
Just something to consider, you probably could test 2-3 different ones each day at work. Maybe more. If your main issue is signal, then flash, check service, if none then flash another right away. I could probably flash 5 different ones on a 15 min break if I was only looking for improved signal. Might be a better way than waiting for someone to tell you what worked for them, then testing only that the next day. Its your phone and your time though, so its your call. Just tryin to help
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DocHoliday77 said:
I think you may have been seeing it function normally though. When idle, its supposed to drop to UMTS to save power and bandwidth. If you check while a transfer is occurring you will see it change to HSPAP.
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Click to expand...
Click to collapse
Nope I know all about that.. it would never get to hspa, always umts, ran it for days and as soon as I switched to a jb modem I got hspa back
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serio22 said:
Nope I know all about that.. it would never get to hspa, always umts, ran it for days and as soon as I switched to a jb modem I got hspa back
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So weird....figured you would know, but wasnt certain. Still, never heard of one doing that. Finicky huh?
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I use the UVMD5 modem and my signal is strong but my battery dies faster...
DocHoliday77 said:
So weird....figured you would know, but wasnt certain. Still, never heard of one doing that. Finicky huh?
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Click to expand...
Click to collapse
Yeah it is weird.. I tried with both touchwiz and aosp with the same result
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