I bought my phone from Japan and I noticed recently that when I am connect to mobile data, the logo shown is "R" meaning roaming, no 3g or lte appearing. What must I do to remove it from roaming? I tried turninh roaming off but it doesn't give me any network.
If I am to root this or flash to remove docomo software, what must I do then? Please help
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I've used my Defy in Korea and there was no problem.
Yesterday I enrolled T-mobile prepaid plan(Monthly 4G $50 and changed my SIM card.
Talking and Texting is working but 3g connection isn't working.
On the status bar, there is "G" sign which means GPRS connection (I found it in google)
When I used Defy in Korea, there was "3G" sign or "H" sign which means 3G/HSDPA(much faster than GPRS)
I think my Defy is only taking GSM(GPRS) frequency.....
I setup "*#*#4636#*#* -> Phone information -> WCDMA preferred or WCDMA only" but still not working.
Now I'm about to try to find a US ROM and flash it... Will it be helpful??
I don't want to lose all the apps & settings........ but if it fix my problem, I'll try it.
What do you think about my idea??
You don't need to flash a new ROM
Your problem is quite common because your ROM (Koren) uses a different baseband. The baseband for US 3G networks is different. Just download the Defy Baseband switcher app from here:http://forum.xda-developers.com/showthread.php?t=1052745 and apply a Baseband for US. This should fix your problem. So, you won't have to loose your installed apps and settings.
Hi everyone and thanks in advance for your time.
I have an unlocked Korean Optimus G Pro from the Olleh company. I switched providers to AT&T but it seems that the phone doesn't has access to the Data network provided. I have great phone signal but no Data network (No 4G LTE, 3G, Edge. Nothing at all). Everytime I turn on my data I get the message "Connection unavailable. Configure Mobile Network or Wi-Fi settings to download data."
I understand that AT&T is GSM. But this phone so far is only working with WCDMA only. I've tried switching it to GSM or any ways to make data network available with AT&T but so far it is not working. I checked the WCDMA Service settings but no luck.
Can anyone help me with this? Thanks! :good:
3rick89 said:
Hi everyone and thanks in advance for your time.
I have an unlocked Korean Optimus G Pro from the Olleh company. I switched providers to AT&T but it seems that the phone doesn't has access to the Data network provided. I have great phone signal but no Data network (No 4G LTE, 3G, Edge. Nothing at all). Everytime I turn on my data I get the message "Connection unavailable. Configure Mobile Network or Wi-Fi settings to download data."
I understand that AT&T is GSM. But this phone so far is only working with WCDMA only. I've tried switching it to GSM or any ways to make data network available with AT&T but so far it is not working. I checked the WCDMA Service settings but no luck.
Can anyone help me with this? Thanks! :good:
Click to expand...
Click to collapse
Hi, Just try to configure the APN for your company, and that´s will be fine
Rucosta said:
Hi, Just try to configure the APN for your company, and that´s will be fine
Click to expand...
Click to collapse
i live in pakistan , i set the apn for my network but still cant get a 3g, H, H+ on my phone . Lg g pro F240L. Any suggestion?
Hello there, I'm in need of your help again.
My SGH-M919 has a problem, it cannot connect to 3G/LTE (Not even EDGE). My carrier uses the 850 mHz band for GSM and 1900 mHz for UMTS, so the phone should be able to use them. The thing is, it doesn't. It only connects to GPRS and the signal is very erratic and weak (Usually 2-3 bars). Sometimes I get SMSs from my carrier saying that I missed like 5 calls when my phone never rang once. I live in a zone with good 3G coverage, so it's not the signal.
I'm currently rooted on Android 4.4.4 (NH7). I already tried selecting "1900 WCDMA" in the *#2263# service menu but that only causes the phone to lose all the signal (And it's a problem to change it back, without signal the service menu doesn't work and I cannot change the Network Mode in Settings).
I've tried to select "WCDMA only" mode before, but my signal just goes to zero (The circle with the slash) before changing back to "LTE/WCDMA/GSM (Auto connect)" automatically.
I also cannot use the Network Operators option. Using "Search now" makes it search for a few seconds before showing the message "Error while searching for networks". The "Select automatically" one shows the message "Unable to connect. Try later" and then connects back to my carrier (Movistar)
My APNs are configured (They did it themselves when I inserted the SIM, but I've configured them manually before). The SIM card works, I tried it in another phone and it got 3G immediately, I also tried another SIM card on the GS4, but the result was the same. Someone told me to upgrade to the latest firmware (NK2) while someone else told me to flash the MDL modem. (Is that even possible? I read something about KNOX blocking all downgrades after 4.3).
Since I couldn't find any direct solution to the problem, I'm recurring to you.
Thanks.
P.S: I didn't change the LTE Band Preference option in the Service Menu because the last time someone messed with it, my IMEI/Baseband went completely nuts, I thought the EFS got corrupted, but they magically appeared everytime I enabled the Airplane Mode (So I was able to select Automatic in the ServiceMenu and they got fixed). Also, I don't live in a LTE area although once during a very strong thunderstorm, I got 4G for a few minutes before going back to G).
*bump*
Any ideas?
Did you put a check mark in data roaming?
Shortbus-Driver said:
Did you put a check mark in data roaming?
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Click to collapse
I've tried with and without it, it doesn't make a difference anyway.
Does it show you have an ìmei # other than all zeros?
Don't post it just a yes or no.
Shortbus-Driver said:
Does it show you have an ìmei # other than all zeros?
Don't post it just a yes or no.
Click to expand...
Click to collapse
My IMEI is fine, the phone connects to the carrier network but it stays on GPRS (and the signal is always dropping)
Update to full NK2 firmware and see if that will fix it
serio22 said:
Update to full NK2 firmware and see if that will fix it
Click to expand...
Click to collapse
I'll try that later. Will I have to re-root and re-install TWRP after flashing NK2?
I have a similar problem with my M919 on the Tmobile network. Using the *#2263# menu I can not get mine to work on WCDMA (4G) either. I can chose GSM /LTE only and my phone works normally but no 4G signal. If I chose WCDMA I get no signal. I can see it trying to connect and immediately dropping the signal. If I choose any option with WCDMA included it has erratic signal and will lose the signal most of the time when I try to make a call. So basically I have the choices of GSM only or GSM/LTE only. Before I discovered the secret menu I was stuck with GSM only in the phone's settings. This has been going on for months. Tmobile changed my SIM card and it didn't help. I've rooted and unrooted my phone (using autoroot) and even tried different modems (even worse signals) and now am back to stock rooted NK2 firmware and modem. I have given up and decided to get another phone (not an S4). My wife's S3 gets great 4G signals in the same location by the way. I wonder if anyone knows why our phones can't use 4G. I am beginning to think it's a hardware problem but I'm way out of warranty on mine.
I converted my VZW Note 4 to the De edition and i flashed cm13 and now it doesn't show 4G LTE anywhere and not even 3G, but it says i have service to VZW, but when i turn on the data it doesn't load anything and i've switched the settings around a lot and tried changing the APN and none of it has worked so far. I've tried a lot of things, i've flashed other roms and my data goes right back to 4G LTE, i've changed some of the settings in the mobile data and i've only managed to get it on x1. I can't add APN, and if i do change it, it disappears from the list. Also in my system info under sim status it says cellular network state: disconnected. pls help me
choochoo01 said:
I converted my VZW Note 4 to the De edition and i flashed cm13 and now it doesn't show 4G LTE anywhere and not even 3G, but it says i have service to VZW, but when i turn on the data it doesn't load anything and i've switched the settings around a lot and tried changing the APN and none of it has worked so far. I've tried a lot of things, i've flashed other roms and my data goes right back to 4G LTE, i've changed some of the settings in the mobile data and i've only managed to get it on x1. I can't add APN, and if i do change it, it disappears from the list. Also in my system info under sim status it says cellular network state: disconnected. pls help me
Click to expand...
Click to collapse
Just throwing this out...do you need a VZW prl?
dear xda-developers
i have just bought unlocked verizon z play to use with docomo carrier in japan. because of lte bands are difference, i cannot use lte network. so i used 3g,4g fix app on play-store trying to access lte network. afer trying change network type and lte bands, my phone now cannot find out any docomo service, its just no service. when i search service manually, the phone find out softbank and y-mobile service but no docomo service. whats problem with my phone? any ideas?
is there any way to use lte network in japan?
help me please,....
thanks so much.
after trying alot of method, i can fix my z play at last. just simply insert orignial verizon sim card, wait for about 5 minutes, my z play said [ activing phone, dont turn off] , then turn off, insert docomo sim, oppp! no service error disappear ! can make call, send messenger and access 3g network with no problem. i dont know the reason, but hope this can help anyone get same trouble.
ps: will pay for anyone who can root the crazy verizon z play. i want to unlock lte band to use 4g network in japan.