Hello all.
I bought a Galaxy Core from the Middle East(2 Sim cards) and tried to use it in America through Strait Talk. The phone is working fine and the only problem I have that I can not get 3G just E (EDGE) which is so slow. I put my Sim Card in a Galaxy S III to make sure that the Carrier provides 3G. As soon as I put the Sim Card in Galaxy S III, I immediately got H +. But when I put it back in my Galaxy Core I got E.
My area covers 3G
APN setting is according to Straight Talk instructions
Any idea why ?
I would highly appreciate your answer and help!!
Check network mode - maybe it is set to use only 2G. You can find it under Settings -> More settings -> Mobile Data
rzepa90 said:
Check network mode - maybe it is set to use only 2G. You can find it under Settings -> More settings -> Mobile Data
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Click to collapse
Mode is already set to GSM/WCDMA (Auto Mode). I can use this option and GSM Only option. I can not use WCDMA Only option. If I chose WCDMA Only, I will loose the the whole mobile service. Thanks a lot for your help and time.
Ahmed_s said:
Mode is already set to GSM/WCDMA (Auto Mode). I can use this option and GSM Only option. I can not use WCDMA Only option. If I chose WCDMA Only, I will loose the the whole mobile service. Thanks a lot for your help and time.
Click to expand...
Click to collapse
Look You can't use 3G on both SIM at the same time. So choose WCDMA only on the SIM you want to use 3G and use WCDMA/GSM on other SIM and this might not be allowing you to choose "WCDMA only" so better check 2nd SIM connection type.
and yup it is common that network disconnects while change the mode of connection. It will be stable after your option is set.
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PRESS THANKS IF I HELPED!
M_E_G_A_T_R_O_N said:
Look You can't use 3G on both SIM at the same time. So choose WCDMA only on the SIM you want to use 3G and use WCDMA/GSM on other SIM and this might not be allowing you to choose "WCDMA only" so better check 2nd SIM connection type.
and yup it is common that network disconnects while change the mode of connection. It will be stable after your option is set.
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PRESS THANKS IF I HELPED!
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In fact I am using only one Sim Card. I chose WCDMA Only and restarted the phone. I lost the service again. Thank you Bro.
I too have an issue with my Samsung Galaxy Core prime sm-g360t, my 3g is not working n I've tried LTE/Wcdma/gsm, buh it's still not working
actually ..our galaxy core now became as trash ...even i faced the same problem but there was no fix except an workaround ...the thing is lots of companies has put many features in their "new" SIMs and galaxy core is unable to process those(hardware problem) but if you use an old sim like 2-3 yrs old it will work for you ...after many many googling i had nothing in my hands but solved it by using my old sim ....just take someone's which is old and see if it helps ....
----by an same problem facer
Post help !!! unlock samsung galaxy s5 scl
i have bought samsung galaxy s5 (SCL23 by au ) from Japan.. After using the handset took automatic
update via wi-fi. And after taking restart... the network was gone. Now its showing out of service
sign instead of network. But sim menu is available in menu. When i wants to use settings>more netwo
rk>mobile network..handset shows "insert sim card to access network services". Out going and incoming
call is off. I can't use mobile data. Now what can i do to recover the network? pls help me.......thanks in advance...
I have a friend using a Sprint Samsung Galaxy S5 that was recently SIM unlocked for international use. We also have a SIM card (egsimcard.co.kr) which has worked for me 4 times in the past year, across various phones. The 3G network (which runs on KT/Olleh) is UMTS 2100, which should work with the SM-G900P (at least according to willmyphonework.net).
We confirmed that the phone said "invalid SIM card" before the unlock, and there is no such message after the unlock. However, the About Phone screens still show the phone number associated with the CDMA profile of the device, even after we switch the phone to GSM/UMTS mode and reboot. It's like we can't make actually make it work in GSM/UMTS mode.
Does anyone have any advice to make this work?
(She is in South Korea now and needs help ASAP, currently renting a phone and wifi hotspot, but would prefer not to.)
We also tried setting the APN and manually searching for the network, but it's all theoretically moot if the phone isn't picking up the phone number on the SIM.
We've even tried the Phone Info menu at *#*#INFO#*#* but there's no access to that running stock ROM.
shoot, i totally missed this post. i always seem to miss the time sensitive ones. Anyways did you go into more networks/mobile networks/network operators and register on the gsm network? you might have to go into the GCF settings on the phone to allow for GSM connections, this can be done with the following steps
Dial *#0011# and in the service menu do the following
Click (menu) then (key input) then input Q then (Ok)
Click (menu) then (back)
Click (menu) then (key input) then input 0000 then click (Ok)
Wait for about 15 seconds then a menu will pop up, from there follow these procedures:
[2] UE Setting & Info >
[1] Setting >
[1] Protocol >
[4] GCF >
[1] GSM/(E)GPRS/WCDMA GCF ON
It will say "success", please reboot via the phone’s power menu after the confirmation.
Got the L29, so dual sim.
My first sim is for calling and sms, so I only need 2G but I can not set it to only 2G. Just the sim for mobile network (it's sim 2) can set to 2G, 2G/3G, 2G/3G/4G and only 4G.
The problem is 3G is really bad for sim 1 and this drain my battery for nothing, cuz I only need 2G for calling/sms.
I got a lot dual sim devices and this one is just strange in some things.
Regards
This is a problem for me, too
Dosen't work, I call already Huwei and they can not help me. Really bad :/
theres a setting in sim card management under mobile networks. it lets you pick which one gets data.
I can easily set 2G only for sim1 here, dont know what you did? Or your carrier doesnt support this, I mean if there is no 2G in your country, why could you change it to 2G?
Same problem on my mate 9 and my axon 7, seems to be an androidwide problem.
NikiFue said:
Same problem on my mate 9 and my axon 7, seems to be an androidwide problem.
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Click to collapse
Naw, it works perfect with OnePlus 3, 3T, Mi5, Mi5s, Mi5s Plus and all other phones. Set Sim 2 to 2G/3G/4G and Sim 1 only on 2G. Here you can set Internet and this is it, the other sim go 2G/3G.
Gesendet von meinem MI MAX mit Tapatalk
In "settings/more/mobile networks" I can set the preferred network mode for each sim card. Had this when I used it as dual SIM for my work: sim 1 data mode on 2g, sim 2 on 4g. Works perfectly, even on 2 completely different providers.
djmvt said:
I can set the preferred network mode for each sim card. .
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I don't believe. When mobile data is default set to sim 1, just to sim 1 can be selected preffered network mode.
In my case: sim 2 -default mobile data- can be set to 2g only/auto 2g3g...evrything. Sim 1 switched automatically to 2g/3g/lte auto-can not be set preffered network mode.
If i switch default mobile data to sim 1, preffered network mode can be modified in sim 1, but not for sim 2, and sim 2 switched auto to 2g/3g/lte auto.
I want like this:
1. sim1 default data-3g/4g/lte
2. sim 2---2g only. But this is not possible because just in this case, sim 2 jump into 2g/3g auto.
djmvt said:
In "settings/more/mobile networks" I can set the preferred network mode for each sim card. Had this when I used it as dual SIM for my work: sim 1 data mode on 2g, sim 2 on 4g. Works perfectly, even on 2 completely different providers.
Click to expand...
Click to collapse
Nope... Just the sim which is for mobile network. If I change sim 1 to mobile network, I can set to only 2G but the other one will be 2G/3G
Storm198025 said:
I don't believe. When mobile data is default set to sim 1, just to sim 1 can be selected preffered network mode.
In my case: sim 2 -default mobile data- can be set to 2g only/auto 2g3g...evrything. Sim 1 switched automatically to 2g/3g/lte auto-can not be set preffered network mode.
If i switch default mobile data to sim 1, preffered network mode can be modified in sim 1, but not for sim 2, and sim 2 switched auto to 2g/3g/lte auto.
I want like this:
1. sim1 default data-3g/4g/lte
2. sim 2---2g only. But this is not possible because just in this case, sim 2 jump into 2g/3g auto.
Click to expand...
Click to collapse
Ah I see what you mean! Have been playing with 3 different dual SIM phones last year so got it mixed up. What I did with my Huawei mate 9 when I used dual SIM was: sim 1 set to auto 4g 3g 2g and on sim 2 I overruled the automatic provider search and just picked the 2g network from my provider. It then still mentioned 2g 3g in dual SIM settings but it didn't connect to 3g because I selected a 2g only network.
Is this how you want it?
on my ZTE it's really funny. the setting is available but disabled lol
Fixed By using Tasker [No Root]
I got this issue fixed by using Tasker so probably there might be an ADB command to set the network mode
My fix:
Make a new task -> Press + button -> Mobile Network Type -> Choose required network mode
Note: Will need to enable USB debugging and use the command `adb tcpip 5555` for getting the permissions. Also this might need to be done after ever phone reboot
Good evening I turn to you because I have a problem with my slot sim 2 I do not have a 4G. When I activate it I have no network. Roaming and any other settings sound activated. At least I hope so.
Although the phone tells me that the network is available, I can not call or receive calls (same for SMS). On the other hand, a priori, no problem to access the internet via 3G. When I try to call I have the following message: Mobile network not available
Help me
Have you tried any other SIM?
You need to go into your mobile network setting and Dual Sim setting to make sure Sim 2 is active.
Now if you want Sim 2 to use 4G you will have to select this in the Dual Sim setting. By default Sim 1 is the default mobile settings.
At any one time 2 sim are in the device only one will use 4G or 3G the other will use 2G.
here are the tests I made with reboot
https://i.imgur.com/VKXibvQ.png
https://i.imgur.com/XGZ1yXi.png
https://i.imgur.com/iLkoRm5.png
Pleaze help
Help help