Develop Bugs

Cingular 8525 / WM6 / UMTS not working

All:
I just got a Cingular 8525 and immediately upgraded it to WM6 (it had WM5 on it for about an hour). I am in a 3g covered area but I do not think I am getting a 3g connection on the phone. I have the big upper case U in a box, and then I have the signal indicator with an E over it. This makes me believe that I am connected to Cingular's edge network. Also, if I am on the phone and I try to run a sync with activesync the phone tells me that I have a voice call in progress. Any suggestions? AT&T support was clueless.

sk7575 said:
All:
I just got a Cingular 8525 and immediately upgraded it to WM6 (it had WM5 on it for about an hour). I am in a 3g covered area but I do not think I am getting a 3g connection on the phone. I have the big upper case U in a box, and then I have the signal indicator with an E over it. This makes me believe that I am connected to Cingular's edge network. Also, if I am on the phone and I try to run a sync with activesync the phone tells me that I have a voice call in progress. Any suggestions? AT&T support was clueless.
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The U indicator is UMTS - that is 3G. However, most of the newer ROMs replace it with a 3G icon. What ROM did you use? Anyway, also, you may try the reg tweak to enable the BAND tab in the Settings > Phone menu. You can find that tweak in the wiki.

todd_jg said:
The U indicator is UMTS - that is 3G. However, most of the newer ROMs replace it with a 3G icon. What ROM did you use? Anyway, also, you may try the reg tweak to enable the BAND tab in the Settings > Phone menu. You can find that tweak in the wiki.
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I have the same thing with my rogers phone, what I'm guessing is the phone is designed to pick whatever signal is strongest, (which is usually Edge) and not often-rescan for UTMS/3G.
If you google and download Band Switcher, you can force UTMS/3G at your leisure.

I wasnt aware the USA had 3G yet? I was always told that Edge was the best they had out there from a few mobile operators in the UK.
What Radio stack are you using?

Cingular, now known as "The New AT&T (AT&T)" has 3G up and running in some of it's markets.

No one seems to be answering this question.

Starfury said:
I wasnt aware the USA had 3G yet? I was always told that Edge was the best they had out there from a few mobile operators in the UK.
What Radio stack are you using?
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We have quite a bit of UMTS and HSDPA coverage here in Massachusetts on Cingular/AT&T.

Not possible to switch bands by shortcut on Samsung i780 (wm6)

I would like to be able to easily switch from 3G to GSM on my i780. The problem is that no applicaation that I tried including various versions of CommManagers, phoneAlarm etc. is capable to make the switch. The only way is to go to the Phone settings menu and do it manualy which is really a pain. Anyone knows an easy way to switch bands? Maybe a shortcut? Thanks.

Lugus von Thierfeld said:
I would like to be able to easily switch from 3G to GSM on my i780. The problem is that no applicaation that I tried including various versions of CommManagers, phoneAlarm etc. is capable to make the switch. The only way is to go to the Phone settings menu and do it manualy which is really a pain. Anyone knows an easy way to switch bands? Maybe a shortcut? Thanks.
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You need to switch off any live packet (GPRS, EDGE, UMTS, HSDPA) Active connection first.

When you go to start -> settings -> connections you can click on HSDPA. Here you switch from HSDPA to GSM.
Good Luck

3G possible with Three Mobile PAYG?

I'm using their PAYG sim which gives a free 150mb allowance for 90 days, but am only ever able to connect via GPRS (my phone says I am roaming as well for some reason). Is anybody else using this sim and able to receive 3G?

yes indeed.
Three don;t have the 3G coverage of the other networks, and so they use Orange as a backup network when you are in an area that does not have any of their own transmitters. Seems you might be in such an area, which is why it says you are roaming cos you're actually on Orange!
Make sure you are not stuck in 2G only mode of course.....
dial *#*#4636#*#*
select phone information
slide down to the bottom, abnd make sure the first menu box is set to WCDMA preferred, and not GSM only.

Thanks for the information, thought this might be the case but wasn't sure. The phone was already set to WCDMA Preferred so I guess GPRS is the best I'm going to get from Three Mobile for the time being.
Thanks also for letting me know how to access the testing screens, lots of good info there!

no probs, here to help.....when i'm in a good mood and not at work of course

WCDMA / GSM auto problem

Hello Guys,
I'm experiencing a problem with my Froyo Desire for probably a week now.
The thing is that in certain areas my Phone can not receive calls / sms or such. In other words "GSM services" dont work. 3g though works fine (stable, strong and fast connection) My Provider is T-Mobile.
After quite a lot of testing I was able to isolate the error:
When WCDMA / GSM is chosen by the phone automatically it seems to me as if it didnt switch "back" to register with my provider via GSM when i want to make a call or if someone wants to call me.
When i switch to "GSM only" manually everything works fine but i have no 3g of course.
I also experience this problem only in certain areas. I live in an area where there is really strong HSDPA available (up to 7mbit\s). When i go to other places of my city i still get HSDPA (not as strong) but calls / sms still work.
The last paragraph may be of no importance, i don know.. probably it helps..
I have googled quite much about this problem and also found a few persons experiencing the same issue but nobody was able to come up with a solution.
I would be very thankful if someone could try to figure this out.
schnip

push______

Hi Guys,
... exactly the same problem here!
- same device
- t-mobile germany
- problem exists only in specific cells
ideas or solutions welcome
LordKnut.

gsm only Desire?
I'm having a nightmare with 3g 2g connectivity on my Desire on the three network whilst at home. If I could manually select gsm only this would be fine as I could still call and text and use wi-fi. Unfortunately my options are gsm/wcdpa (or whatever) auto or the 3g only.
can someone please advise if it is possible to select gsm only and if so, how?
many thanks

Can someone please advise me how if possible, to set the desire to gsm only?

VKeane said:
Can someone please advise me how if possible, to set the desire to gsm only?
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Click to collapse
Wireless and network-Mobile network- should be here somewhere.

Thanks, but there is no option for gsm only. It's wcdma only or gsm/wcdma auto. there has to be a way around this.

Similar problem, different version
I've experienced similar problem.
In some area, I can get steady grps signal when I switched GSM only on; but when I switched WCDMA/GSM on, I could get no data connection at all.
I'm using China Unicom's mobile service.

Solution
Hi there,
I've the same issue and I fix it allowing the option GSM/WCDMA Auto in the configuration menu.
Then enter the following code *#*#4636#*#*, select "phone Information" and set preferred network type, set "GSM car (PRL)".
Sorry about my bad english.

[Q] Change preferred network order?

I have a slightly odd requirement, and I wondered if there was any way to fix it:
My carrier has a partnership with a second carrier so we can roam on each others networks for no extra cost.
Where I live, my own carrier only gives me a 2G signal, whereas the other gets 3G. Thing is, I have to physically select the other network. If it's on Automatic, it always "prefers" my own carrier.
This is fine until I'm on the other side of town where the other network gets no signal at all. I then have to manually select my own carrier again!
Is there any way to get it to prefer the other network, or even more ideally, prefer the one that offers the better signal at any given point?

Hi,
a bit of *bump* because I'm struggling with the same issue. I had such option on my previous samsung i780 (oooold) and it worked like a charm.
Currently my mobile operator has 2 roaming partners and if I want to change quickly the preferred order (because in some location it might have better coverage but only there and only for a while) I wold have to switch simcard to the old phone...
Isn't there at even a separate aplication to do that? Does andorid API allow such modification?

Glad I'm not the only one!
Interesting you mention an app to do it... i've not looked actually. If an app can access the list of networks and actually set the phone to use one, then I guess it would be possible. I'll check it out...

to the best of my understanding this is somewhat network option/setting and when suggesting an app I was thinging abount some way to read this setting, modify it and then save/send back to network. It would be a matter of access to the network settings from the API and knowledge how to operate it....

Still investigating this. Looks like the stuff to access the list of networks is in some internal APIs, so a little harder to access. I'll post back when I learn more...

Hey I hope you guys can figure this out have you tried the *#*#4636#*#* command and changed the radio? This will select the most preferred network.. e.g. I'm with Telstra in Australia, the stock radio defaults to 2100MHz but Telstra's HSPA+ is 850Mhz.. so I have to switch to AUS2 radio so it defaults to that every time.
Sent from my Galaxy Nexus using xda premium

@Simmo3D
It's not about the radio band but about the service provider itself.