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i9020A (ATT) completely lost 3G on all ROMs, help!

I've completely lost 3G ability on my NS, and I'm not sure what happened.
Here's my order of tweaks:
CM7 nightly (with 3G)
MIUI (with 3G)
ICS rom from SDK (no more 3G!)
ICS from kwiboo (no 3G)
ICS from koush (no 3G)
CM7 stable (no 3G)
I guess sometime during my playtime with the ICS from SDK build, something messed something up and subsequently I cannot get 3G anymore, regardless of ROM.
I'm not sure where even to begin troubleshooting.
- Yes, "use only 2G networks" is unchecked
- My APN should be correct, as they are the ones that loaded automatically from the ROMs. That has always worked before
Anyone have any ideas? I'm desperate for help. I haven't had 3G for what feels like a month!

Here http://forum.xda-developers.com/showthread.php?p=19424857 in this post there is a link to the radios try flashing one of those to see if that fixes things. If not try flashing a stock unrooted rom and start over
Sent from my Nexus S using Tapatalk

You know what? A new radio worked! I don't know why I didn't think of it before. Seems so easy in hindsight.
This brings up another interesting thing. Seems like a lot of the radios that used to give me 3g don't give it to me anymore, including the most popular ones people are using. That's weird...
edit: Actually, no radio issues anymore. My old radio gets 3g again, as well as others. I just needed to rotate the radio versions a few times and reboot a few more times and it fixed itself. Totally weird, but no more problems!

I had the same issue on AT&T 2 nights ago. It turned out that it was an AT&T network issue which was confirmed by tech. support.

[Q] Unable to connect Rogers LTE using BuoyAOSPsy

Do any of you have any experience using this custom rom on your Rogers SGS2 LTE? After installing this, I'm not able to connect to LTE...it seems to be stuck in 4G no matter where I go in the city (BTW, I'm in Vancouver). I've even tried to flash the stock Rogers radio onto my phone and played around with the band settings..but still the same thing. When I restore back to my stock rom, I'm able to get LTE speeds.
What am I missing?
Thanks!

da_angelboy said:
Do any of you have any experience using this custom rom on your Rogers SGS2 LTE? After installing this, I'm not able to connect to LTE...it seems to be stuck in 4G no matter where I go in the city (BTW, I'm in Vancouver). I've even tried to flash the stock Rogers radio onto my phone and played around with the band settings..but still the same thing. When I restore back to my stock rom, I'm able to get LTE speeds.
What am I missing?
Thanks!
Click to expand...
Click to collapse
Are you actually running speed tests, or are you just going by the icons? BuoyAOSPsy has an unfortunate tendency to give the same "H" symbol for LTE and HSPA+. Working on fixing it in the next build.

Thanks jomeister15! I just ran a speedtest...and you are absolutely correct about the LTE icon not showing up correctly. It just seems to be stuck on 4G even though I'm on the LTE network. Looking forward to the next build =) Very nice rom so far!

It's complicated!

Hi fellow Xoom owners.
I'm having this issue with my 3G Xoom that I can't just get past.
As soon as FedEx handed me my internet-ordered tablet, I started looking into rooting methods and all.
Strangely, even though I live in Saudi Arabia, I received it with the US firmware, kernel or whatever it's actually called (MZ600 - XOOM WITH WI-FI + VERIZON 3G Build HRI66) which I didn't know at the time it was Verizon's but was wondering why 3G didn't work.
Anyway, I followed a rooting tutorial without paying attention to the build which got my Xoom stuck into the Moto logo thing.
Following tutorials into how to restore it, I downloaded the right build for Saudi Arabia (MZ601 - XOOM WITH WI-FI + UMTS Build H.6.1-38-9 for Retail Other International) which worked like a charm and with 3G!
Since, at that point I was already out of warranty, I flashed a Tiamat ROM and worked great but without 3G (bummer!).
Going through ROM trials, I'm now on Team EOS Verizon 4G ICS ROM but, as you've already guessed, no 3G for me (duh!).
I noticed that Team EOS are also working on a MZ601 ROM which should have worked to my favor of regaining 3G back but is somwhy isn't.
Bottom line of the story, I want to regain my 3G back while staying on an ICS ROM, preferably Team EOS's .
It's way better than the Honeycomb it came with and I'm not ready to lose all my game save files again!
Please help me.

The Link you provided in you post (Team EOS Verizon 4G ICS ROM)- That Build is not for your Device, as you device is not MZ602 with 4G LTE. Seeing that you received a US MZ600 Xoom that is actually CDMA and not GSM, it is suprising that the MZ601 UMTS worked for you. But since you say that it worked:
Try this one Team EOS ICS, EU 3G Xoom (umts_everest / MZ601)
http://goo-inside.me/roms/teameos/releases/umts_everest/Eos-umts_everest-1.0.0.zip
Google Applications (Required for all devices)
http://http://goo-inside.me/roms/teameos/gapps/EOS_GApps_ics_4.0.3_v10.5.zip
As Always, If This Was Helpful - Hit The Thanks Button!

I've already tried that ROM and for some reason it did't work.
Though on earlier versions, it used to give me a certain error which goes something like "phone.android.'something' stopped working" but now it doesn't.
As for the build I received it with, I haven'y the slightest idea how that happened!
I even took a picture of of my tablet before rooting in case anything went wrong... here.

Check this thread, you can try out Umts Everest - Euro & also Stingray 3G, as you are having CDMA xoom

hotdude2411 said:
Check this thread, you can try out Umts Everest - Euro & also Stingray 3G, as you are having CDMA xoom
Click to expand...
Click to collapse
Seems promising but gives me the "502 Bad Gateway" BS.
I'll try a bit later or will look for other sources.
EDIT: BTW, since I'm already on ICS, I don't need to factory reset, right?

yea there seems to be an issue with the download links.
its better to do a clean install, you can always backup your apps & data.

Since you brought it, how can I make a backup of my data?
By data I mean game saves 'cuz that's what I can't afford to lose {: s
I wanted to install CM9 on my Galaxy SII but stopped at the same data backup problem.
And, isn't there any tool to use on my PC to backup apps & data and manage my device ROMs... etc?

Titanium backup is one of the best apps to backup data and apps in my experience. You can find it on the play store. Also im not sure if you can buy the pro key for it but it makes reinstalling everything a breeze. Can you still connect to wifi?
Sent from my SPH-D710

@fredrick
RedXXII already gave the answer which i was gonna say. titanium backup is the best, you can backup & restore app + data easily. you just need a rooted device to use titanium backup.

So guys, let me get this straight:
You're saying that an MZ600 Xoom will work on a 900/1800 3g network just by flashing it with a european rom? I thought this was impossible

thread starter himself said that he flashed a 3G rom, which worked for him
I downloaded the right build for Saudi Arabia (MZ601 - XOOM WITH WI-FI + UMTS Build H.6.1-38-9 for Retail Other International) which worked like a charm and with 3G!
Click to expand...
Click to collapse
that's y its suggested to him to flash euro 3G rom

I have absolutely no idea how this happened.
I bought it from an Arabic online store for use in my country but received with a different ROM.
After restoring my tablet from the Moto logo error, I restored it to the official international firmware and it started working AND with Arabic support!
Maybe seller ordered the wrong software on the right hardware???

charos said:
So guys, let me get this straight:
You're saying that an MZ600 Xoom will work on a 900/1800 3g network just by flashing it with a european rom? I thought this was impossible
Click to expand...
Click to collapse
Agreed. The electronics involved in GSM and CDMA is definitely different. I think that is why his data never worked in the first place

OK.
I finally found working links for the codename android ROM v1.6.0 and tried the stingray 3G and the umts and none worked.
Any idea on what could be done at this point?
I re-checked the data bearers of both International and European firmwares and they are exactly the same.
Couldn't there be something like a missing driver or so that would make my Xoom recognize the carrier?
Or alternatively, isn't there a way to unlock it to any carrier supporting the same data bearers?

This is puzzling me for some time now. I have an MZ600 (Verizon 3G without the 4g upgrade) but I live in Europe. I know that MZ600 has Qualcomm MDM6600 which supports both cdma and umts. So I thought that using it in Europe would be as easy as switching Team Eos rom from "stingray_cdma / MZ600" to "umts_everest/MZ601" . I had the idea that this would change the baseband and I will manage to register on a 3g (european) network. Sadly, this isn't true and I'm still puzzled whether this is even possible or I haven't found the right way yet.
So to sum things up:
Is Qualcomm MDM6600 capable for both cdma & umts?
Is so, does anyone know someone that managed to get the MZ600 to register on a umts 3g network ?(you may see the signal of 3g but you cannot register)
If anyone can shed some light regarding this issue, it would be nice .

Check product specs for your original country and current place of use.
I believe they have totally different data bearers.
But, who am I to say?
I'm the one with a paradox over here!

so mr. Fredrick Sylar
what version of the xoom do you use...? the MZ600? or the MZ601?

well anyone ......?

have a look at this guys....
http://www.mydroidworld.com/topic/8333-tbh-us-gsm-band-unlock-for-droid-2-global-and-pro-updatezip-public-release/

Net10 Data problems

Recently I bought a Samsung Galaxy S2 Skyrocket from AT&T, along with a Net10 SIM card. Everything works, but the data is unreliable. At home (10 miles from Harrisburg, PA), I have a five bar signal, but the internet works on and off. Even when I have the 4G icon on my phone, the internet does not always load. I have (best) coverage in my area, too. I have searched forums, and contacted customer support, and did not find any useful help. I have tried several APN configurations, and my modem ICS is the latest as far as I know (UCLI3), unless if I have a leaked version. Should I downgrade my ICS, upgrade to the leaked ICS, or root my phone? Is there anything I can do?

yevy1234 said:
Recently I bought a Samsung Galaxy S2 Skyrocket from AT&T, along with a Net10 SIM card. Everything works, but the data is unreliable. At home (10 miles from Harrisburg, PA), I have a five bar signal, but the internet works on and off. Even when I have the 4G icon on my phone, the internet does not always load. I have (best) coverage in my area, too. I have searched forums, and contacted customer support, and did not find any useful help. I have tried several APN configurations, and my modem ICS is the latest as far as I know (UCLI3), unless if I have a leaked version. Should I downgrade my ICS, upgrade to the leaked ICS, or root my phone? Is there anything I can do?
Click to expand...
Click to collapse
I would downgrade to ics and start trying out multiple radios and apns ucli3 for me did help in anyway if that doesnt work I would go even down gb good luck is allbi can say but net10 from what i hear isnt the awesome its like more like 1/2 3g
Sent from my SAMSUNG-SGH-I727 using xda premium

Net10
crashpsycho said:
I would downgrade to ics and start trying out multiple radios and apns ucli3 for me did help in anyway if that doesnt work I would go even down gb good luck is allbi can say but net10 from what i hear isnt the awesome its like more like 1/2 3g
Sent from my SAMSUNG-SGH-I727 using xda premium
Click to expand...
Click to collapse
I have a Samung Galaxy Proclaim from Net10 that gets up to 3 Mbps on 3G in my area, which is enough for me. It's pretty annoying when I look at my Galaxy S2 Skyrocket, and it's not loading or lagging at 200kbps.

UCLF6
I downgraded to the uclf6 modem, which sped up the data connection by a little, but not much. I'll try downgrading even more.

I have tried the two new leaks for the ICS modem, which were UCLK4 and UCLL3. Both modem versions were unstable. What I will stick to is the Telus SGH-T989D modem update, which had proven to be the most stable and beneficent results. Thank you for all of your help!

[Q] anybody else having 4g connection issues?

About 3 weeks ago after installing the update of liquidsmooth 4.4.4 i randomly started dropping to 3g service in places that i normally had full 4g available. It has slowly gotten worse to where if im not on wifi, than the phone is pretty much useless. i normally have full coverage everywhere. so i originally thought that maybe something had gotten messed up on the update, so i did a clean install of liquidsmooth 4.4, and blackbird kernal and same thing still occurred. also tried carbon rom and slimrom, and no luck. so for the fun of it, i went ahead and reflashed the phone back to stock from backups and rerooted it, updated the modems and reinstalled liquidsmooth w/ blackbird kernal, and same thing. i have went through all the mobile networks settings and tried everything and nothing seems to help, idk if that update screwed something up or if its an issue that others have been experiencing as well, or if im just screwed and my phone phone is dying.... any help is appreciated thanks

rideforlife7 said:
About 3 weeks ago after installing the update of liquidsmooth 4.4.4 i randomly started dropping to 3g service in places that i normally had full 4g available. It has slowly gotten worse to where if im not on wifi, than the phone is pretty much useless. i normally have full coverage everywhere. so i originally thought that maybe something had gotten messed up on the update, so i did a clean install of liquidsmooth 4.4, and blackbird kernal and same thing still occurred. also tried carbon rom and slimrom, and no luck. so for the fun of it, i went ahead and reflashed the phone back to stock from backups and rerooted it, updated the modems and reinstalled liquidsmooth w/ blackbird kernal, and same thing. i have went through all the mobile networks settings and tried everything and nothing seems to help, idk if that update screwed something up or if its an issue that others have been experiencing as well, or if im just screwed and my phone phone is dying.... any help is appreciated thanks
Click to expand...
Click to collapse
I'm currently running OmniToad, and ran CM 11M8 for a short while. On T-Mobile at least, with the custom ROMs it's normal to see H+ only when data is being transferred; it will drop back to 3G otherwise. When I ran the stock ROM on the Relay, it would always say "4G" regardless of whether it was in UMTS (3G) or HSPA+ mode. Apps like SignalCheck or CellMapper will tell you which mode it is really in.
On the other hand, if data transmission is only going through as 3G, it could be a phone issue or a tower issue. Is LTE available in your area, or are they just getting it set up? I know when T-Mobile was upgrading the Chicago area to provide LTE, there were a few glitches here and there.
It was stupid for T-Mobile to brand HSPA+ as "4G" but that's a different rant.

Bobby Tables said:
I'm currently running OmniToad, and ran CM 11M8 for a short while. On T-Mobile at least, with the custom ROMs it's normal to see H+ only when data is being transferred; it will drop back to 3G otherwise. When I ran the stock ROM on the Relay, it would always say "4G" regardless of whether it was in UMTS (3G) or HSPA+ mode. Apps like SignalCheck or CellMapper will tell you which mode it is really in.
On the other hand, if data transmission is only going through as 3G, it could be a phone issue or a tower issue. Is LTE available in your area, or are they just getting it set up? I know when T-Mobile was upgrading the Chicago area to provide LTE, there were a few glitches here and there.
It was stupid for T-Mobile to brand HSPA+ as "4G" but that's a different rant.
Click to expand...
Click to collapse
yea LTE has been in this area for quite a while now, i had it with my S4 and it worked perfectly, i never had a problem with the service on the relay either up untill a few weeks ago the internet speed and and data coverage was great, not quite as fast as the LTE on my S4 but it was still more than adequate, i used to use the hotspot and stream netflix on my laptop. now i can usually get a text to send but calls usually fail and if i try and use the internet its impossible. it almost seems like its doing the exact opposite of what it should be doing, as soon as i try and use anything (not while connected to wifi) than it drops coverage to 3g/edge/ or to nothing at all. Im leaning towards the hardware failing side, but i figured i might as well give it a shot and post it and see if maybe i wasnt alone. thank you for your reply.
small note of background on me: first time posting ever in this forum but have been using the tools and roms from it for a long time, so im not a complete noob, but i definitely still have a lot to learn.