Develop Bugs

Questions about band setting

I live in the UK, and am using a foreign version of a TP2 that I bought on eBay. I think it's probably the Hong Kong version - it's in English, but with support for Chinese characters on the keyboard.
Something I do fairly regularly is switch between 2G and 3G modes on my TP2 manually. I've created a start-menu short-cut to CMBandSwitching.exe which lets me change the phone's Band setting between "Auto", "GSM" and "WCDMA". My somewhat limited understanding of these settings is that "GSM" basically means "2G", and "WCDMA" basically means "3G". When I set the phone to "GSM" it picks up GPRS or EDGE signals (according to the status bar). When I set it to "WCDMA" it picks up HDSPA or 3G signals (if there are any). What I thought "Auto" mode did was simply switch automatically between 3G and 2G mode depending on 3G signal strength - so that if there's a 3G signal it uses that, if not, it uses 2G.
However, it seems like there may be slightly more to it than that. If I have the phone in GSM mode at home and search for available networks, it finds O2, T-Mobile, Vodafone and Orange (in that order - does that mean O2's signal is the strongest, or does it put it at the top of the list because I have an O2 SIM?) In WCDMA mode it only finds O2, which would suggest that O2 is the only 3G signal that can be picked up in my home (and even that's pretty weak ). However, if I set the phone to Auto, then search for networks, then it also starts to get a signal from the 3 network and lists all 5 carriers - in other words, in Auto mode it finds a signal which is not visible in either GSM or WCDMA mode. This suggests that Auto may be doing something else besides switching between 2G and 3G. Can anyone explain this?
Also, if O2 is the only network it can find when set to "WCDMA" does this mean that O2's is the only 3G signal I can receive?
Finally, there are four possible frequency settings in the lower part of the BandSwitching app. These are:
Auto
GSM(900+1800)+UMTS(900+2100)
GSM(1900+850)+UMTS(1900+850)
UMTS(2100+800)
Which is the best setting for UK use? I'm currently using the second one, and it seems to work okay, but would I gain anything by switching it to "Auto"? And can someone give me an idea of which areas in the world I could get decent 2G or 3G reception with that selection of settings available?

(bump)
No one...?

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?
Click to expand...
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.

HTC Desire reception

Hello! I bought a desire second hand and it has no reception. I tried to change the radio and I tried almost everything. It didn't work. When there is an outgoing connection the reception is 3 and 4 bars but when the device go to sleep and then wakes up there is no reception. I think that is a problem in 2G module but I can't find the desire's scheme to see where is the 2G module situated and to see if it is broken.
Please if someone has a a scheme please post it or know what is the problem.

toncata said:
Hello! I bought a desire second hand and it has no reception. I tried to change the radio and I tried almost everything. It didn't work. When there is an outgoing connection the reception is 3 and 4 bars but when the device go to sleep and then wakes up there is no reception. I think that is a problem in 2G module but I can't find the desire's scheme to see where is the 2G module situated and to see if it is broken.
Please if someone has a a scheme please post it or know what is the problem.
Click to expand...
Click to collapse
It looks at the operator's APN, it is possible that they are not in his place.
Is it Sim-Unlock???
You should not change the Radio until you do not solve the problem. Anyway: does he settle well when you change it?

Wel1973 said:
It looks at the operator's APN, it is possible that they are not in his place.
Is it Sim-Unlock???
You should not change the Radio until you do not solve the problem. Anyway: does he settle well when you change it?
Click to expand...
Click to collapse
Yes, it is Sim-Unlock. When the outgoing connection is active, there is no problem, Sometimes it drops but most of the cases it is stable and it doesnt stop. But when going to sleep there is no reception.
I look at the APN but everything is ok.

Type this on telephone: *#*#4636#*#*
It looks in the principal field of the submenu, and if it puts WCDMA you must change to GSM auto (PRL). It can be that it gives turned out...
Greetings.

Wel1973 said:
Type this on telephone: *#*#4636#*#*
It looks in the principal field of the submenu, and if it puts WCDMA you must change to GSM auto (PRL). It can be that it gives turned out...
Greetings.
Click to expand...
Click to collapse
It doesnt resolve the problem. Still exist.

Is it possible the problems is from this:
http://www.parts4repair.com/htc-desire-antenna-cover-black/

toncata said:
Is it possible the problems is from this:
http://www.parts4repair.com/htc-desire-antenna-cover-black/
Click to expand...
Click to collapse
Ummm!
If, probably.
It seems of the hard....
Good Luck!! and Grettings!!

Is someone know if there is some tech in the antenna cover or what is the role of it?

i have the same problem.
WCDMA works fine but GSM is broken. I've tried everything... different radios, settings, etc... looks like a hardware defect.
Did you find a solution?

I would love to find a way to really troubleshoot this. I've been having problems with flakey reception for a very long while. Im inclined to think the desire simply does not perform well in areas with moderate to low coverage. In other words, it needs a strong signal.
Are you sure your provider has a gsm network? In Canada, Bell and Telus (and their discount brands) don't have a gsm network. They built a hsdpa network on top of their old 2G cdma network. They are not compatible. Rogers network is better since you can always fall back on the legacy gsm network.
Sent from my HTC Desire using xda app-developers app

Network 4G, E okay, but no 3G..

Hi,
Anyone have any ideas on what the issue may be with my UK (EE) G4 ?
H815
Android 6.0(MM)
SW vers V20b-2340-30
Baseband Version - MPSS.BO.2.5.c3-00101-M8992FAAANAZM-1.31581.1
I get 4G no problem and 'E' (not sure about others) but cannot get 3G.
I think 4G is 2100 and 3G is 1800... would these be different chips in mobile so it's a hardware or aerial issue?
I've tried setting it to .2G/3G only' in normal Settings - and I get no signal.
I've also been in the test/etc menu [ accessed via *#LGMENU#*815# ]
. field test / mobile settings / Network Mode - and that's set to AUTOMATIC
. field test / mobile settings / RAT Selection - and that's set to GSM/WCDMA/LTE auto
Anything else I can look at / modify (of course mobile out of warranty a few weeks ago!)
I could try a factory reset it I have to or I could just blow the old EE -F/W and forget about it..
Just wondered if there was anything else I can look at/change quickly.
HISTORY:
I used to use wifi calling (EE signal at home non-existent) but after getting motherboard replaced (boot loop issue), I ended up with the 'standard' FW which doesn't have EE-Wifi extension.
As a result EE sent me an extender which doesn't work with my mobile as it's 3G specific(?).
My son can get calls through that so I know it's my phone that's at fault (in fact EE examined the log for my calls and said they can't see any recent use of 2G or 3G on my mobile at all).

kevcal said:
Hi,
Anyone have any ideas on what the issue may be with my UK (EE) G4 ?
H815
Android 6.0(MM)
SW vers V20b-2340-30
Baseband Version - MPSS.BO.2.5.c3-00101-M8992FAAANAZM-1.31581.1
I get 4G no problem and 'E' (not sure about others) but cannot get 3G.
I think 4G is 2100 and 3G is 1800... would these be different chips in mobile so it's a hardware or aerial issue?
I've tried setting it to .2G/3G only' in normal Settings - and I get no signal.
I've also been in the test/etc menu [ accessed via *#LGMENU#*815# ]
. field test / mobile settings / Network Mode - and that's set to AUTOMATIC
. field test / mobile settings / RAT Selection - and that's set to GSM/WCDMA/LTE auto
Anything else I can look at / modify (of course mobile out of warranty a few weeks ago!)
I could try a factory reset it I have to or I could just blow the old EE -F/W and forget about it..
Just wondered if there was anything else I can look at/change quickly.
HISTORY:
I used to use wifi calling (EE signal at home non-existent) but after getting motherboard replaced (boot loop issue), I ended up with the 'standard' FW which doesn't have EE-Wifi extension.
As a result EE sent me an extender which doesn't work with my mobile as it's 3G specific(?).
My son can get calls through that so I know it's my phone that's at fault (in fact EE examined the log for my calls and said they can't see any recent use of 2G or 3G on my mobile at all).
Click to expand...
Click to collapse
the biggest thing I tell people to look for is what ever carrier you are on make sure all the carriers bands support 2g 3g and 4g of device A lot of times this is a major cause. Of said issue. I run into this a lot using Verizons devices on AT&T

Well it used to work...
Maybe I'll do a complete factory reset to see if any software's affecting it...

kevcal said:
Well it used to work...
Maybe I'll do a complete factory reset to see if any software's affecting it...
Click to expand...
Click to collapse
That didn't make any difference..
Still stuck with no 3g or 2g access.
Guess from the lack of responses that it's likely to be a hardware fault..

..

the shield that covers SOC seems to be culprit for me, when I reseated that thing I was able to get some 3g connection compared to nothing.

Thanks, worth looking at

Either you changed your modem, or your provider is no longer using 3g
My provider is dropping 3g in certain areas in favour of 4g....so I'm not able to go back to 3g if the area already has 4g
Might not be answer your are looking for
But that's my 2 cents

Moved to Nougat and updated modem, no improvement. I Swapped networks (tried 3) and all the same problem so guess a hardware issue..
Just bought V30 so G4 will be my backup, so will live with it I guess.
Thanks for the ideas everyone.