Voice calls on my telecom operator works on WCDMA-900 (band 8), if I choose "EURO BAND" from menu *#*#4696#*#* - connection is not available, if I choose "Automatic" - it works fine. That on the on firmware cm-11.0-XNPH05Q.
The new firmware cm-12.0-YNG1TAS17L DOESN'T have point "Automatic" in the menu "Select radio band", only "EURO Band" and "USA Band". Therefore, with the new firmware 12S has stopped working WCDMA 900 (band 8), I think "EURO Band" set automatically.
But earlier, before flashing 12S everything worked fine, WCDMA-900 (band 8) worked on "EURO BAND".
What can I do to work with the WCDMA-900 on the new firmware (12S)?
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I am using a UC-series ROM (recently UCKK4). It automatically selects band. It is not stable and is weak. I inspect the band selected for me: it is WCDMA 1900. Actually, the best band is GSM 850 in my area. When I use engineering mode *#2263# to select the band, I got "RAT Selection Option is Restricted!".
Do you know how to change RAT status? How to set the band to GSM 850?
Note: The method given in "Get Around "RAT SELECTION RESTRICTED" on i897 modems" (http://forum.xda-developers.com/showthread.php?t=1189241) is not recommended since it may burn SIM card (some users already pointed out this).
Hello,
I am Uresh and have Lenevo A850 with android 4.2.2 Installed.
I have issue with data connecion.I have 3g plan in my operator.
When i start internet it automatically take GSM mode.
I want to change it to CDMA/WCDMA mode.
Settings - > All Settings -> More ... -> Mobile Networks -> " Network Mode" is Disabled.
Please advice something or solution ,what to do for that ?
3G Network: WCDMA 900/2100MHz (AP/EAST/MEA), 850/1900MHz (LA)
2G Network: GSM 900/1800/1900MHz (AP/EAST/MEA), 850/1800/1900MHz (LA)
Speed: HSPA+ 21Mbps (DL) / 5.76Mbps (UL)/ EDGE
dial *#*#4636#*#* in the dialer n select "phone info" in the popup menu n change gsm to wcdma only
I bought my 1+ from the website and it was working on Wind's network (1700/2100 MHz) until just now. I flashed CM12 nightly and realized I couldn't make phone calls (data and WiFi were fine). So I followed a thread on XDA and changed my band to USA/Europe (*#*#4636#*#*), but none of these have 1700 or 2100 selected. Now, my phone won't detect Wind's network in Settings > Network Operators and data/SMS/voice won't work.
I tried many different modems (CM12, 44S, etc.) but it only shows Bell, Telus, Rogers on the network scan. Any ideas on how to get Wind back?
Update, here's my analysis (this is for CM12 nightly):
In the stock 44S ROM there was an option to choose "Auto" for GSM/UMTS band under the phone testing menu (open Phone, dial *#*#4636#*#*, click Phone Info). Auto lets the phone pick up frequencies that are not specified in the other 2 choices: USA and Europe, such as 1700 MHz and 2100 MHz.
If Europe or USA is chosen for the GSM/UMTS band, there is no way to go back to Auto and the phone is locked out of connecting to networks running on the 1700 and 2100 MHz frequencies, such as Wind Mobile in Canada and other AWS providers. This is urgent and the only way to fix it was to flash back to stock, choose Auto, and reflash later versions. Changing ROMs or modems did not work.
Does anyone else have a similar issue (you can check whether or not you have the Auto option in the testing menu) or is there a way to fix this that I'm oblivious to? I've raised a JIRA to Cyanogenmod.
I'm going to access *#*#4636#*#* and trying to explore setting around there, and I open the radio band setting, in the "set radio band mode" it's just United States listed there and so I click on it, after selecting radio band to United States my phone can't connected to 3g/2g network. is there any solution?
edit: solved. Restore ROM to COS13.1 and access radio band setting and now there's three option "auto", "EU" and "US".I set it to auto and my mobile data working again.
Hi,
On my old Sony, I had something like "LTE/WCDMA/GSM" mode, so phone could successfully fall back to GSM when 3g/4g connection is weak.
Is there such an option for Pixel 3?
I've tried various settings from 4636 menu, but it looks like there is no such option. Even in "GSM auto (PRL)" or "Global auto" is still uses UMTS with -100...-110 dbm signal strength, while in "GSM only" there is -89dbm available.
Is there a settings or some adjustable through adb option, which allows GSM fallback?
I also could write an android app, in order to switch into GSM in some circumstances, if possible.
I've located in the eastern europe, if that matters, and LTE/WCDMA work best on my network, except in my office location.