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Touch cruise won´t connect to HSDPA Tmobile NL

My TC won´t connect to the T mobile HSDPA NL network. It currently is showing 3G with full signal strength. I also have HSDPA coverage in my area.
I talked to Tmobile customer service and they say its probably a setting in th e phone. I have HSDPA enabled in the phone. I have had my sim card replaced since my old one was about 8 years old.
Any ideas?
Is there anyone on the Tmobile network that has HSDPA running on the TC?
Thanks.
Martin

I had the same problem... but the Polaris told me only GPRS network was available... After a Hard Reset the problem went away...
If you've been messing whith aGPS, that could be the source of your problem as, that's the only regedit I didn't do after the Hard Reset...

Hi,
For the poster of this thread. Check this link. It's in dutch, maybe things get clearer.

I already did a hard reset and I haven´t been messing around with the GPS registry settings.
This is really annoying me.

maverick44cd said:
I already did a hard reset and I haven´t been messing around with the GPS registry settings.
This is really annoying me.
Click to expand...
Click to collapse
Maverick,
If your Polaris is showing 3G next to the connection that it is sensing the HSDPA. The only time the 3G changes to an H is during packet download. It will switch back and show 3G as a 'ready' state for high speed, 'E' for Edge Ready and 'G' for GPRS ready. The 'E' and 'G' show the same as connected. The '3G' is the only one that changes to 'H' during an active HSDPA transaction.

Exactly the same problem over here.
Pit in combination with my tmobile contract. but no hsdpa

Raskell,
I talked to TMobile customer support about this and they said I should be able to join the HSDPA network the believe the phone is stuck in UMTS mode(3G) they said it's probably a phone setting since I comply to all the requirements for HSDPA. However they couldn't tell me what setting could possibly be wrong.
How do I get it to packet download? should I try to download a large file 50 MB or something like that?

maverick44cd said:
Raskell,
I talked to TMobile customer support about this and they said I should be able to join the HSDPA network the believe the phone is stuck in UMTS mode(3G) they said it's probably a phone setting since I comply to all the requirements for HSDPA. However they couldn't tell me what setting could possibly be wrong.
How do I get it to packet download? should I try to download a large file 50 MB or something like that?
Click to expand...
Click to collapse
use DSL Speed Test

reyjabs said:
use DSL Speed Test
Click to expand...
Click to collapse
Already did that, stays solid on 3G

You should download a large file when te 3G sign is there. It should become an H when the dowload runs.
With PIT and PIT + it makes no sence to have HSDPA because you never can reach the speed you want.
Only with IT and IT+ it makes sence because then you can reach max speed.

Jazzamataz said:
You should download a large file when te 3G sign is there. It should become an H when the dowload runs.
With PIT and PIT + it makes no sence to have HSDPA because you never can reach the speed you want.
Only with IT and IT+ it makes sence because then you can reach max speed.
Click to expand...
Click to collapse
hi Jazzamataz, I´m now downloading a 50 MB file or does it needs larger like 700 MB? However I get a nice 45 KB/s download but no H remains on 3 G.

No 50MB is enough, as soon as data is downloaded it should jump in H mode.
Did you set the mode on auto in the setting of your phone?

The band settings are on auto, I already tried setting them to different bands manually, no effect though. Perhaps the fault lies in TMobiles own network(settings).

Jazzamataz said:
You should download a large file when te 3G sign is there. It should become an H when the dowload runs.
With PIT and PIT + it makes no sence to have HSDPA because you never can reach the speed you want.
Only with IT and IT+ it makes sence because then you can reach max speed.
Click to expand...
Click to collapse
As i said on another forum. I have the normal PIT, but when i am on HSDPA i download with around 600kbit/sec. And this is everyday, not just a moment..i really dont understand, but to be honest, i dont care.

Yzord said:
As i said on another forum. I have the normal PIT, but when i am on HSDPA i download with around 600kbit/sec. And this is everyday, not just a moment..i really dont understand, but to be honest, i dont care.
Click to expand...
Click to collapse
Nice answer...this will help alot

Yzord said:
As i said on another forum. I have the normal PIT, but when i am on HSDPA i download with around 600kbit/sec. And this is everyday, not just a moment..i really dont understand, but to be honest, i dont care.
Click to expand...
Click to collapse
Where are you located in NL, did you change any settings on your phone that could be related to HSDPA?

Maverick,
TMobile here in the states does not even support HSDPA. With AT&T(Cingular) they us the 850 MHz band for HSDPA and 1900 for Edge/GPRS. TMo is 1900 only. In Europe, UMTS is 2100 MHz which is not used in the USA.
I know of no phone settings to address this. I agree with the comments to use a bandwidth test site to check your 3G speeds. It may be that you are getting HSDPA. I use http://utilities.globequest.com.ph/ and run the bandwidth meter test several times to ge an average. Mine is typically in the 600-800Kbps range. If I turn off HSDPA, I generally see it drop to 150-200 Kbps. Hope this helps.

Jazzamataz said:
Nice answer...this will help alot
Click to expand...
Click to collapse
My answer is helping more people then this answer from you

maverick44cd said:
Where are you located in NL, did you change any settings on your phone that could be related to HSDPA?
Click to expand...
Click to collapse
Nope, i live in Nijmegen...and i didnt change a thing.

I'll contact TMobile thru mail. Perhaps I get to speak someone at TMobile who's proficient.
Yzord if you didn't change anything in the settings it must be a issue with the TMobile network itself. I live in Almere and according to TMobile there should be HSDPA coverage here.

another radio question

Story: we all have HTC's at work. My service manager with the Touch Diamond (Verizon) is running a radio to use Sprint cell towers in our area (which outnumbers all others). I was wondering if that was possible for the G1. He's running WM 6.5 and Android on it.

No,there is not one for the g1...yet. But even if there was...i think it would require extra hardware

i was thinking to flash the radio he used the same way i did when i updated to the rc33 radio. i believe he has the latest radios for att, verizon, and sprint. that's why I decided to ask just in case.
thanks

Hey, if you have hardspl installed,and the rc29 DREAIMG.NBH on your sdcard,you can give it a shot and see and give us results(i need sprint even tho i have tmobile,only 3g in area is spring)

I'll give it a try on Tuesday. That was my main purpose in inquiring. Seeming as to how Sprint had like more cell towers than all others combined. And he's been using it with much satisfaction.
otto888 said:
Hey, if you have hardspl installed,and the rc29 DREAIMG.NBH on your sdcard,you can give it a shot and see and give us results(i need sprint even tho i have tmobile,only 3g in area is spring)
Click to expand...
Click to collapse

in this works i might have a heart attack, i really would love to get on the att towers for 3G

Sprint & Verizon use CDMA, T-Mobile & AT&T use GSM.
This, unfortunately, is not possible.

i just put a radio that was used for the Kaiser onto my dream and immediately i noticed a difference in the camera speed. almost as soon as i pressed the camera button it took the picture. i used radio 1.71.09.01 all you need to do is extract the .zip from the download, and open the .nbh in a hex editor. then i saved it as radio.img and placed it in the update.zip that contains the latest radio for the g1. then i resigned it and flashed it and voila i have a new faster radio on my phone. over the next few days i will run some speed tests on the local edge network and different radios to see which one works best in the stl area. but i am freaking excited to see that i tried something and it worked.

When I get to work I'll ask if he tried the ATT radio yet.
Manacit said:
Sprint & Verizon use CDMA, T-Mobile & AT&T use GSM.
This, unfortunately, is not possible.
Click to expand...
Click to collapse

tubaking182 said:
i just put a radio that was used for the Kaiser onto my dream and immediately i noticed a difference in the camera speed. almost as soon as i pressed the camera button it took the picture. i used radio 1.71.09.01 all you need to do is extract the .zip from the download, and open the .nbh in a hex editor. then i saved it as radio.img and placed it in the update.zip that contains the latest radio for the g1. then i resigned it and flashed it and voila i have a new faster radio on my phone. over the next few days i will run some speed tests on the local edge network and different radios to see which one works best in the stl area. but i am freaking excited to see that i tried something and it worked.
Click to expand...
Click to collapse
Mind sharing the update.zip? i have edge and 3g towers in my area and would be glad to test.

otto888 said:
Mind sharing the update.zip? i have edge and 3g towers in my area and would be glad to test.
Click to expand...
Click to collapse
unfortunately we can't get 3G from at&t as they run 3g on the 850 & 1900 mhz range, and the G1 only gets edge in that range. the G1 is set to recieve hsdpa(3G) in the 1700 and 2100 range. kinda sucks but if at&t rolls out into the 1700(download) and 2100(upload) then we can steal 3G since t-mo has failed me in getting 3G into my area.
on a side note anybody have an updated roll out schedule for 3G in 2009 for t-mo?
apparently since i am using my phone as a tether right now i can't upload my update.zip. but following the steps above should work. or PM me your email and i should be able to send it to you that way
go to Kaiser ROM development and search for "ultimate radio thread" and you will find a list of all the radios that work on the kaiser, each of them are mirrored to an external site, and you can download from there

just installed the radio you sent me,internet on edge and gprs is faster,but drains battery quicker.... But now i have another reason to get a extra battery!

I'm not testing the battery life of the phone each time, just speed testing right after flash and taking a pic to test the lag on that. Those that wanna try new radios be warned I can't tell you what radio will work best for you, I can only tell you what works for me. All problems that you come across after flashing are your faukt. I do not want 100 PMs from people asking how to fix it just cause I tried it

would one be able to extract the radio from the iphone 3g if one had the latest firmware? i have much time, and don't mind give it a try. battery life isn't a problem. have a 1600mAH for lounge nights and the 2600 for wtf (work time fun!)

if you wanted to try it it couldn't hurt to see, we aren't going to get 3G unless we have t-mo 3G in the area. but i am curious to know what the radio from the iphone would do on this phone. try it oud and look for speed test in the market and use that to test the download and upload speed. it's what i have been using, and that way we get one program doing all the tests for us and so we should all have the same margin of error

I took a look at the iphone firmare, looks like you need a Mac. Most of the files that look like ones to use are in .dmg format, here's the link to the newest firmware http://www.iphonefirmware.com/firmwares-download/ to extract the files, just download the file, and change the extension to .zip

CDMA is much different as it uses a PRL, or Preferred Roaming List to decide what towers to connect to based on roaming agreements that carriers make. I remember when I was with Verizon, you could dial *226 SEND and it would connect you to a system that would download the latest PRL to your device. Sometimes it would result in better service, other times not. The equivalent to a PRL in GSM is stored in what I believe is a write-protected area of the SIM Card.

Sadley I have to agree with you Datruesurfer, but if I may the code for vzw, I worked there till Jan of this yr, is *228. Unfortunately you have read correctly, I did some research on this a while back when I bought my sim reader. All the info for the towers are stored on the sim for GSM/3G as some like to use, although part of the info is stored in the phone as part of the firmware, this I figured out, because I see 2 not one AT&T in my net ops at all times, and my sim is a brand new 3G compatible sim. The reason for this is one of them is for Edge/GPRS, and the Other has 3G also incorporated. Unfortunately as of the moment I can only connect to the one that is Edge/GPRS.

card13 said:
I took a look at the iphone firmare, looks like you need a Mac. Most of the files that look like ones to use are in .dmg format, here's the link to the newest firmware http://www.iphonefirmware.com/firmwares-download/ to extract the files, just download the file, and change the extension to .zip
Click to expand...
Click to collapse
if i go out tomorrow i will get better internet(only option at home is to use my phone as a tether), and i will download and convert the .dmg to a .iso and have a look see. to be honest i don't know what to look for but i certainly wanna look around. this is the most work i have ever done with a phone. when i had my kaiser everyone else seemed to know a whole lot more than me and i felt left out and i never could help anyone, here in the dream forums i feel like i accomplish something every day

Well, I'm going to a 3g area today with the krazer radio...will report back results.
Before(from memory): download was about the same as edge...upload....well...you cant test that on a g1.
After: 149kb/s download
Edit: i also have a new sim card that customer care says its "made for 3g"...I guess we will see.

New ADP 1.5 Radio

Anyone having great gains with this radio? I am gettin better reception in my office (any) where I used to get none!

Had it on for about an hour now, not seen it drop below 2 bars yet. Usually I lose service quite often. Looking forward to trying it at work tomorrow where I get extremely poor signal.
Still flickers between G and 3G though.

makethetick said:
Had it on for about an hour now, not seen it drop below 2 bars yet. Usually I lose service quite often. Looking forward to trying it at work tomorrow where I get extremely poor signal.
Still flickers between G and 3G though.
Click to expand...
Click to collapse
You can use anycut or bettercut to set up a shortcut for 3G only.
Instructions: New Shortcut- Activity- Phone Info.

im on at&t, so i dont hit 3g at all. But getting edge in the office.

Gimpeh said:
You can use anycut or bettercut to set up a shortcut for 3G only.
Instructions: New Shortcut- Activity- Phone Info.
Click to expand...
Click to collapse
Cheers, I'm going to keep both enabled though, reception is poor at the best of times so I like the idea of keeping my options open

froggymike911 said:
im on at&t, so i dont hit 3g at all. But getting edge in the office.
Click to expand...
Click to collapse
dude you will not get 3G on at&t on the g1. research the phone hardware man... tmobile uses 1700 and or 2100 band for 3g access at&t uses a different band... as to all other wireless carriers or there would be a network clash...

clevetbs said:
dude you will not get 3G on at&t on the g1. research the phone hardware man... tmobile uses 1700 and or 2100 band for 3g access at&t uses a different band... as to all other wireless carriers or there would be a network clash...
Click to expand...
Click to collapse
before you insult people use your eyes and read
"im on at&t, so i DONT hit 3g at all. But getting edge in the office."
unnecessary rudeness never helped anyone

Anybody extract it yet? I'd like to give it a test.

if by extracted, you mean seperated from the rest of 1.5, yes, i got it that way on haykuro's google code page.
ESKIMOn00b - thanks for havin my back

froggymike911 said:
if by extracted, you mean seperated from the rest of 1.5, yes, i got it that way on haykuro's google code page.
Click to expand...
Click to collapse
Extract: 1. To draw out or forth; to pull out; to remove forcibly from a fixed position, as by traction or suction, etc.; as, to extract a tooth from its socket, a stump from the earth, a splinter from the finger.
LOL!!! I'm not messing with you. I just couldn't help myself!!! Thanks for the info.
Edit: I think I was getting better reception with the 2.22.19.23 radio. I'll test this one for a couple of days to see whats what.

froggymike911 said:
if by extracted, you mean seperated from the rest of 1.5, yes, i got it that way on haykuro's google code page.
ESKIMOn00b - thanks for havin my back
Click to expand...
Click to collapse
yup!
and to stay on topic, ive got and flashed the new radio yet but havent really noticed any improvements, might just have to go swing by my buddys apartment, never get service in there. must be lined with lead or some $%!^...

Tested out this version the day it came out and i must say the sapphire radio is much better in many ways. Not only does it extend your battery life way more than the ota radio, it also has great service. The ota radio says your on 3g like 90 percent of the time even though you're running on edge, so i guess this might be a bug in that radio. All in all the sapphire radio is the best way to go.

I also think i am getting better reception with the new radio. However my battery life has gotten much worse. I dont even make it a full day without charging and was getting at least 1.5 days before. If it is not the radio causing this the only other possible cause is the calendar widget being on the home page.

Olinex Hard-spl : the good, the bad...

First off, this is a complaint post. I truley grateful for you cooks, and programmers at this site. The following is just my observations (for better and for worse) on how this hard-spl affected me. The rhodium is my fourth smartphone that ive owned and unlocked from this site, so i slightly experineced with the unlock proccess (the mda, g1, and the kaiser). Although with this device, however the results of this hspl crack is most intriguing.
Lets start with..
The Good - For the most part its free. This means the gift of being able to try out other peoples roms is something anyone can enjoy. This is what xda is all about, or atleast this is what we cherish the most.
The Bad - Right after I installed oplix hspl and flashed my new rom, the camera doesnt want to load. It either the "data frame" message or the "driver" error. I trying everything except "relock" the hspl (flashed stock rom, stock radio, hard resets, that mitty wipe, camera cabs, registry edits,) . Im no expert, but some thing tells me its that Olinix. Does anybody know if this could be one of those "know issues" that sometimes happen with the verizon version?
The Ugly? -
Well, uglys not really the best word... atleast not yet. You see I realized just today, every since I sim-unlocked my phone (although not CID unlock) I discovered the most suprising thing, Free Data access! And no im not refering to Opera mini, im talkin about pocket twitter, facebook, youtube (low quality only), opera mobile, PIE, htc weather, the whole enchilada.
Now for all you people thinking this sounds too good to be true, well your right. There is one major flaw with the data stream, which i will get to later. First let me describe my exact circumstance to achive this oddity.
My rhodium is verizon. Its sim unlocked (but not security unlocked!), and im using a Tmobile prepaid sim with the sidekick plan. There is a balance of 0$ on my account, and it hasnt been active for a couple months. I have oplix hspl and a Mighty Rom installed. I deleted the verizon apn from connection settings and made a new one with the T-mobile apn, but i still named it Verizon anyways cuz im weird like that... After experimentation, i found out that it only works with the radio in Global mode. Good thing with a US sim inserted, the phone always defaults to GSM mode anyways... or atleast it does for me Under these conditions, I still get data access despite the fact that the sidekick plan doesnt include data access, and also the fact that THERES NO MONEY in my prepaid account.
Ok now to the ugly: The Catch. As i said before there is a catch to the "free data". That is its nowhere near 3g speeds, even for tmobile standards. Its like 8mbs/hr download speeds (using IE, not Opera mini). I know that seems horrid but theres a lot of things on you phone that requires a data plan (if no wifi available) thats very low bandwitdh. That social app updates, email sync, weather update, casual browsing, low quality youtube stream if desperate enough. Lets face it, we cant be surrounded by wifi all the time; so even getting dail-up_ish data access for free could be use be nice.
Just for the heck of it, heres my theroy why the bandwitdh is so slow. It seems to me that its due to constant interruption. For expamle when i go to google from IE, the web page seems to load a bit then stop 1/3 of the way. This Tmobiles server restricting access, and usually the browser would just quit after a couple of seconds. But for some reason it looks like the phones radio "reboots" just before the browser would normally time-out, and therefore able to "steal" another 1/3 of web page from the apn again and again. This play between APN and radio isnt too obvious and some may just pass it off as just a really low bandwitdh service.
This is very freaky behavior. Ever since Tmobile "secured" their sidekick prepaid data access to only sidekicks, i have not been able (with the exception of opera mini) access data from tmobiles hiptop APN. I wonder what make this device so special? Is because its a world phone? or are the newer radio patches able to reconnect faster? Well anyways am i the only one who noticed this, or am I losing it?

you're blaming the wrong people, t-mobile and at&t run on different gsm bands here in the states. you'll get 3g speeds in any country but not north america.

Not a single one of your complaints has anything to do with the Hard SPL. The camera access is determined by the software drivers in the ROM. Ask about it in the thread of whatever ROM you are using.
The 3G access for T-Mobile(1700/2100) is on a completely different frequency than your Verizon(800/1900) device. This is defined by the hardware, not the software. There is no "radio patch" to allow such a thing. You will never get more than EDGE speeds on the Verizon TP2 on T-Mobile's network. Just enjoy your free data access.

cajunflavoredbob said:
Not a single one of your complaints has anything to do with the Hard SPL. The camera access is determined by the software drivers in the ROM. Ask about it in the thread of whatever ROM you are using.
Click to expand...
Click to collapse
Im not too sure about that because I havent been able to get the camera working with ANY rom - and i tried a dozen already, even stock. I guess the only way for me to rule out my theroy, would be to take out hspl and reload official rom and radio. Im a little hesitant about that since you only get one free unlock from olinex, so im on the fence still.
cajunflavoredbob said:
The 3G access for T-Mobile(1700/2100) is on a completely different frequency than your Verizon(800/1900) device. This is defined by the hardware, not the software. There is no "radio patch" to allow such a thing. You will never get more than EDGE speeds on the Verizon TP2 on T-Mobile's network. Just enjoy your free data access.
Click to expand...
Click to collapse
Well, the icon at top is "E" symbol which i assume is for edge, because while commuting it would change to the "G" which i presume is a step below edge. Is this just a glitch in the WM OS?

maxinf said:
Im not too sure about that because I havent been able to get the camera working with ANY rom - and i tried a dozen already, even stock. I guess the only way for me to rule out my theroy, would be to take out hspl and reload official rom and radio. Im a little hesitant about that since you only get one free unlock from olinex, so im on the fence still.
Click to expand...
Click to collapse
If it isn't working on the stock ROM, then you've very likely got a defective device. Hard SPL has nothing to do with the camera. Set it back to stock everything and do a warranty exchange/repair if you still have time. Check with HTC to see when it will expire if it hasn't already. You normally get 15 months from HTC on a brand new device.
Well, the icon at top is "E" symbol which i assume is for edge, because while commuting it would change to the "G" which i presume is a step below edge. Is this just a glitch in the WM OS?
Click to expand...
Click to collapse
Why would that be a glitch? The service is determined by whatever the tower has. If the tower you're connected to has EDGE service, it will say EDGE. If it has only GPRS, then it will say GPRS. You will never be able to 3G from T-Mobile on the Verizon model. The hardware does not have the capability.

cajunflavoredbob said:
Not a single one of your complaints has anything to do with the Hard SPL. The camera access is determined by the software drivers in the ROM. Ask about it in the thread of whatever ROM you are using.
The 3G access for T-Mobile(1700/2100) is on a completely different frequency than your Verizon(800/1900) device. This is defined by the hardware, not the software. There is no "radio patch" to allow such a thing. You will never get more than EDGE speeds on the Verizon TP2 on T-Mobile's network. Just enjoy your free data access.
Click to expand...
Click to collapse
Agh, I cant take it anymore. Im gotta rule out the possiblity once and for all. Im going to revert hspl, radio, rom back to stock. Ill report back with the results... crossing my fingers!

[fixed] Internet problem on sensation?

Hi,
To be clear: Internet is not the app, not over Wifi but over 4G/3G/H etc..
I got my sensation 3 days now and there seems to be a issue with the internet connection.
Mine keeps requesting data but it doesnt get any data back.
Apps like internet browser sometimes work and sometimes they dont (loading google), the weather app says there is no internet connection and manage to sometimes get the actual weather.
I tried restarting it serval times but no success..
Internet does work on my HTC Hero.
Edit:
Found the problem, had to enable data roaming..
Odd thing that it works sometimes without roaming tho..

4G internet issues
I am having the same problem with my internet, though enabling data roaming did not correct my problem. Internet and web based apps work fine over WIFI, but will randomly work over 4G. Is anyone else having a similar issue?

palehose80 said:
I am having the same problem with my internet, though enabling data roaming did not correct my problem. Internet and web based apps work fine over WIFI, but will randomly work over 4G. Is anyone else having a similar issue?
Click to expand...
Click to collapse
I get a severe lag now and then when connected to 4G - seems to take a while for the connection to initiate. I've tried the "fix" posted in another thread, but that only seemed to resolve the issue temporarily.

It seems like location may have something to do with it as well. The tower closest to my home is where I experience the most issues. Though my G2X or my fiance's vibrant work without any issues.

palehose80 said:
It seems like location may have something to do with it as well. The tower closest to my home is where I experience the most issues. Though my G2X or my fiance's vibrant work without any issues.
Click to expand...
Click to collapse
That could contribute to my issue. I seem to live near a cell dead zone.

Theres a few threads open on this issue. There doesnt seem to be a permanent fix yet, but it is extremely annoying.

Same here, my connection would send data but winter recieve sometimes. Kinda annoying. Hopefully, htc addresses this problem soon.
Sent from my HTC Sensation 4G using XDA Premium App

Same issue - across multiple handsets
Hi, it's been a while since I posted in XDA but this issue has been a regular one with my T-mobile service, across multiple devices. I have searched far and wide for anyone else seeing this exact problem, and finally here you are. I hope this helps other users:
1) Purchased the original myTouch 3G; approx 1 year with zero connectivity issues. Loved it, exceptional for its time.
2) Purchased (upgrade) myTouch 3G Slide at launch. Following 3-5 months saw This issue with outgoing data, but no incoming response. 60/40 the internet would respond or not in any application (web, streaming, podcasts), it was a real crapshoot. Assumed the problem was isolated and performed a few master resets. Zero apps installed and continued to see the same issue. Decided it was either software or radio related and called T-mo for advice. They suggested a replacement unit after standard troubleshooting (re-seat SIM, master reset, check that you have substantial signal).
3) New MT3G Slide, same outcome. Called back. Finally received a reasonable suggestion: get a new (free) SIM from T-mo as the one I currently had was slightly older. Was sure this was the issue as the rep sounded very confident when I explained the situation. Received new SIM!
4) No change, issue persisted. Following day called T-mo and had a 'ticket' escalated to engineering dept. Was assured I would receive a call from eng. dept, but no such luck. Bothered by this whole mess and lacking in answers from T-mo, I sold the Slide and upgraded to the G2X.
5) The issue once again reared its head! If the stars were aligned and I did get In/Out data, it was 11KB/s (90kbps) tops. Ex: 5MB podcast would take 0.5-1.5 min (30-90 sec) to download prior to issue, now 10-15 min. This was with no apps installed, 4 bars of signal, 4G status icon, across multiple geographical locations, and fingers on both hands crossed. It was about this time I suspected that somehow T-mo's network was throttling my account. But, I had never used more than 1GB in a month, and they assured me I was not being throttled. A serious WTF was had
6) Realizing there were bigger problems in the world and finally at wit's end, I returned the G2X and am waiting patiently for my contract to expire in July, while using an old Nokia candybar in the meantime for calls and text only.
7) July: move to new carrier or stay with T-mo (if we can figure out what this issue is). 8 year customer, need internet on a smartphone though.

Apollo-2 said:
Hi, it's been a while since I posted in XDA but this issue has been a regular one with my T-mobile service, across multiple devices. I have searched far and wide for anyone else seeing this exact problem, and finally here you are. I hope this helps other users:
1) Purchased the original myTouch 3G; approx 1 year with zero connectivity issues. Loved it, exceptional for its time.
2) Purchased (upgrade) myTouch 3G Slide at launch. Following 3-5 months saw This issue with outgoing data, but no incoming response. 60/40 the internet would respond or not in any application (web, streaming, podcasts), it was a real crapshoot. Assumed the problem was isolated and performed a few master resets. Zero apps installed and continued to see the same issue. Decided it was either software or radio related and called T-mo for advice. They suggested a replacement unit after standard troubleshooting (re-seat SIM, master reset, check that you have substantial signal).
3) New MT3G Slide, same outcome. Called back. Finally received a reasonable suggestion: get a new (free) SIM from T-mo as the one I currently had was slightly older. Was sure this was the issue as the rep sounded very confident when I explained the situation. Received new SIM!
4) No change, issue persisted. Following day called T-mo and had a 'ticket' escalated to engineering dept. Was assured I would receive a call from eng. dept, but no such luck. Bothered by this whole mess and lacking in answers from T-mo, I sold the Slide and upgraded to the G2X.
5) The issue once again reared its head! If the stars were aligned and I did get In/Out data, it was 11KB/s (90kbps) tops. Ex: 5MB podcast would take 0.5-1.5 min (30-90 sec) to download prior to issue, now 10-15 min. This was with no apps installed, 4 bars of signal, 4G status icon, across multiple geographical locations, and fingers on both hands crossed. It was about this time I suspected that somehow T-mo's network was throttling my account. But, I had never used more than 1GB in a month, and they assured me I was not being throttled. A serious WTF was had
6) Realizing there were bigger problems in the world and finally at wit's end, I returned the G2X and am waiting patiently for my contract to expire in July, while using an old Nokia candybar in the meantime for calls and text only.
7) July: move to new carrier or stay with T-mo (if we can figure out what this issue is). 8 year customer, need internet on a smartphone though.
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I am having the same issue, and have gone through the same steps. New Sensation (exchnaged mine twice now) followed by new SIM, tried the *fix* posted, turned on data roaming, and still nothing. I have talked to Tmo several times, and they are supposed to be checking the towers in my area, an engineer is supposed to contact me in up to 72 hours. The Evo 3D comes out before my 14 day return period, so I may just jump ship if this problem persists. Hoping to find a fix though, as this phone is amazing when it's on Wifi