Develop Bugs

[Q] 3G

Hi,
i m using my HTC phone in Mexico with Telcel. I bought a 3G package but I cannot receive the 3G and i m only in edge. I ahve done the configuration that i found in various webpage for Android but it doesn t change. The same thing happens with a Samsung galaxy S.. I tried the sim in an iphone and it does receive the 3G.
Is there anyone who knows if there is something t do, to configurate so that my cell can work in 3G in Mexico?
It would be very helpful.
Thanks.
Mike

Maybe your Preferred Network Type is selected Only 2G?

Thanks but i tried in Auto and also selecting WCDMA only but it only receives 2G ...
Celphone is purchased in Europe but 3G works in all other countries out of Europe..
:confused

S
Same proplem here
EDIT
OTHER people with same problem http://forum.xda-developers.com/showthread.php?t=2060657

Z5 Premium Dual SIM question

For those who have it, is it possible on the dual sim version that when one SIM is on LTE voice/data, can SIM 2 have voice on 3G? I have 2 SIMs with the same company but the company doesn't have a 2G network only 3G/4G LTE.

defender007 said:
For those who have it, is it possible on the dual sim version that when one SIM is on LTE voice/data, can SIM 2 have voice on 3G? I have 2 SIMs with the same company but the company doesn't have a 2G network only 3G/4G LTE.
Click to expand...
Click to collapse
yes in the settings you can assign each sim to do any function exclusively.

SO to confirm, SIM 1 can be on 4G and SIM 2 can be on 3G? Can you take a screen shot of the menu? Thanks

defender007 said:
SO to confirm, SIM 1 can be on 4G and SIM 2 can be on 3G? Can you take a screen shot of the menu? Thanks
Click to expand...
Click to collapse
The phone will use whatever the carrier gives you access to. If for whatever reason SIM 1 gets 4G and SIM 2 only gets 3G, then that's what the phone will get. The sim card looks to your phone carrier and signal availability to determine what service is provided to the phone.
If you also want to limit it to only go as high as 3G, I believe there is also an option for that. I have a Dual SIM Z5 with only one SIM atm. So pictures from my phone are going to be useless for you. But the pathway is as follows:
Settings\Dual Sim settings\Sim card for data Traffic.
hope this helps

I have a Note 5 Dual sim and when SIM 1 is 4G, the second one only has 2G as an option. You wouldn't happen to have another SIM you can throw in and see if sim 1 can be 4g and sim 2 can go to 3g? Preferably the second sim would be either Bell or Telus since they have no 2G network. I really appreciate it. Don't want to buy another 900$ phone to find out that it won't work.
Thanks

defender007 said:
I have a Note 5 Dual sim and when SIM 1 is 4G, the second one only has 2G as an option. You wouldn't happen to have another SIM you can throw in and see if sim 1 can be 4g and sim 2 can go to 3g? Preferably the second sim would be either Bell or Telus since they have no 2G network. I really appreciate it. Don't want to buy another 900$ phone to find out that it won't work.
Thanks
Click to expand...
Click to collapse
Unfortunately I don't have another one. The Z5 uses a micro sim and I don't know many people with one. You're likely able to call up Sony's sales line and have them ask a tech who does know for sure though. If you do, please report back with what you find so this might benefit another person in your same situation!
Good luck!

It won't work, I just looked up the user manual:
Selecting mobile networks
Your device supports the use of two different networks at the same time. You can
select from the following network mode combinations when two SIM cards are
inserted in your device:
• One LTE network and one GSM network
• One WCDMA network and one GSM network
• Two GSM networks
For each SIM card, you can set your device to switch automatically between mobile
networks depending on which mobile networks are available where you are. You can
also manually set your device to use a particular mobile network mode for each SIM
card, for example, WCDMA or GSM.
Different status icons are displayed in the status bar depending on the type or mode
of network that you are connected to. Refer to Status icon on page 35 to see what
the different status icons look like.
Thanks for your help. I'm out of luck...

defender007 said:
It won't work, I just looked up the user manual:
Selecting mobile networks
Your device supports the use of two different networks at the same time. You can
select from the following network mode combinations when two SIM cards are
inserted in your device:
• One LTE network and one GSM network
• One WCDMA network and one GSM network
• Two GSM networks
For each SIM card, you can set your device to switch automatically between mobile
networks depending on which mobile networks are available where you are. You can
also manually set your device to use a particular mobile network mode for each SIM
card, for example, WCDMA or GSM.
Different status icons are displayed in the status bar depending on the type or mode
of network that you are connected to. Refer to Status icon on page 35 to see what
the different status icons look like.
Thanks for your help. I'm out of luck...
Click to expand...
Click to collapse
And that is exactly the case.
One sim is 4G/3G and the other only 2G.
If in the mobile network settings you try to switch SIM 2 from GSM to 3G or 4G you get a notification that SIM 1 will switch to GSM and that SIM 2 will be data traffic SIM card.

I have Z5 Premium Dual and if I set SIM 1 as 4G or WCDMA (3G), SIM 2 will be 2G only. If I set SIM 2 to be 4G or WCDMA, SIM 1 will be 2G only.
You can not set to WCDMA for both or 4G for both slots. But you can set to 2G for both slot, only it's useless to you.
The combination for SIM 1 and SIM 2 is:
- 4G preferred and 2G only
- WCDMA preferred and 2G only
- WCDMA only and 2G only
- 2G only and 2G only
- 2G only and WCDMA only
- 2G only and WCDMA prefered
- 2G only and 4G prefered
So if your carrier do noth have 2G, it's better you use as single SIM or find another dual SIM phone that support 3G on both slots.

I add a last detail to this useful discussion:
You can set mobile data both in the 4G SIM or in the 2G SIM, doesn't matter. You can use voice calls on 4G SIM 1 and keep 2G SIM 2 for data and voice.

I have a dual SIM Z5 premium:
The worst bit is not the fact that only one SIM can have 4G at a time, which seems not to be a problem to most people. The real issue is not even the fact that I have 2 4G Sims and changing from one to another takes many seconds, in which it goes into no signal. The real issue is that when you are at a call in the none-internet assigned SIM, the other internet SIM stops working and you lose your internet connection. The only way to maintain your internet connection is in the only case that the phone call is been made by the same SIM that is currently giving the internet. And no, you cannot change in the middle of a call, since changing disables both Sims for to many seconds and the call would be hanged.
Please if any other user has found a way around this, beside connecting to Wi-Fi, please tell

Run Data Service on one Sim
defender007 said:
For those who have it, is it possible on the dual sim version that when one SIM is on LTE voice/data, can SIM 2 have voice on 3G? I have 2 SIMs with the same company but the company doesn't have a 2G network only 3G/4G LTE.
Click to expand...
Click to collapse
Yes it is possible that you can use LTE and 3G sim in your Sony Z5. Even it is also possible that you can use LTE sim in both sim ports in all Sony Z series phones. But there is one condition that you have to run data access only from one sim. You will be not able to run data service on both sim cards. You can do this by going to settings option and set your one sim card for call/messages and another for data service only. Check Sony Xperia Z5 Manual- guideusermanual.com/product-name-xperia-z5-manual&po=570042&lang=English for details.

Network problem on ONE PLUS 3

I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?

[email protected] said:
I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?
Click to expand...
Click to collapse
thats probably because jio is a 4g only network and oneplus 3 doesn't support both sims running 4g at the same time.

bonham1988 said:
thats probably because jio is a 4g only network and oneplus 3 doesn't support both sims running 4g at the same time.
Click to expand...
Click to collapse
But bsnl is not 4g right?

[email protected] said:
But bsnl is not 4g right?
Click to expand...
Click to collapse
That doesn't matter, you can only set 4g network on the sim that has an active data connection. Suppose you have idea and Airtel and both have 4g, which ever sim is your data sim will be able to have 4g access.
Sent from my OnePlus3 using XDA Labs

[email protected] said:
I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down
---------- Post added at 07:42 AM ---------- Previous post was at 07:41 AM ----------
nikhil.agrawal said:
That doesn't matter, you can only set 4g network on the sim that has an active data connection. Suppose you have idea and Airtel and both have 4g, which ever sim is your data sim will be able to have 4g access.
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down

Dual SIM Function - Honor 8 Pro

I hope someone can help to answer the following query as I can't seem to get any information / confirmation on it's dual SIM functionality. As some of you may now, some countries has discontinue in offering 2G connectivity.
On the Honor 8 Pro dual SIM, does it function as ;
A) if SIM1 is selected as default data line on 4g/3g - can SIM2 run simultaneously on 3g (non-data)? Or,
B) if SIM1 is selected as default data line on 4g/3g - will SIM2 run simultaneously on 2g only (non-data)?
Noted they are dual stand-by. My question it's on the band connectivity for the none default data line.
Hope to get some guidance

digiman1800 said:
I hope someone can help to answer the following query as I can't seem to get any information / confirmation on it's dual SIM functionality. As some of you may now, some countries has discontinue in offering 2G connectivity.
On the Honor 8 Pro dual SIM, does it function as ;
A) if SIM1 is selected as default data line on 4g/3g - can SIM2 run simultaneously on 3g (non-data)? Or,
B) if SIM1 is selected as default data line on 4g/3g - will SIM2 run simultaneously on 2g only (non-data)?
Noted they are dual stand-by. My question it's on the band connectivity for the none default data line.
Hope to get some guidance
Click to expand...
Click to collapse
I strongly think it's B because that's how the network with Honor 8 works.

A) is true! But B) doesn't allow you to be based only on 2g, it switches between 3g 2g
Also if you select mobile data default sim as 2, then it will be switched to 4g network and if your sim 1 is 4g only, it will be withering around with no network

aKp1 said:
A) is true! But B) doesn't allow you to be based only on 2g, it switches between 3g 2g
Also if you select mobile data default sim as 2, then it will be switched to 4g network and if your sim 1 is 4g only, it will be withering around with no network
Click to expand...
Click to collapse
I also facing the same problem.I have 2 sims one Jio and one BSNL.I Jio as SIM1 and BSNL as SIM2.In my area for BSNL both 2g and 3g are available but 3g has less strength.So it switches between 3g ang 2g.My battery drains fastly

Dual sim problem

Hi there :
I use dual sims on my 7T. from different carriers.
SIM1 only for voice call and on 3G network (in my place 3G has better signal than 4G)
SIM2 for DATA and on 4G .
when i do voice call by using SIM1, Sim2 drop to 3G and slow speed.(showing H or H+ on top bar. )
as in Australia non-carrier support VOLTE or VOWIFI on Oneplus 7T (or say all the oneplus phone base on my research),I can understand when voice call the network have to switch to 3G from 4G then go back after calls.
but in Dual Sim setup ,is it should be remain the network type and has same fast speed ?
Thanks in advance.

There's only one modem, so it can only do DSDS (dual sim, dual standby). When in a call, the other connection is dropped. This is why your data switches to sim1's 3G.
Are you intentionally trying to avoid using volte/vowifi for calls? If not, you likely need to do this: https://forum.xda-developers.com/oneplus-7t/how-to/volte-op7t-t4007085

ziddey said:
There's only one modem, so it can only do DSDS (dual sim, dual standby). When in a call, the other connection is dropped. This is why your data switches to sim1's 3G.
Are you intentionally trying to avoid using volte/vowifi for calls? If not, you likely need to do this: https://forum.xda-developers.com/oneplus-7t/how-to/volte-op7t-t4007085
Click to expand...
Click to collapse
Hi Thanks for your reply.
I see the reason. so DSDS can not support the way I want to use.
I tried the link you mentioned before. no luck.
In Australia, oneplus is not officially on market. So none of carrier support Volte on Oneplus.
My understanding is VoLTE and VOWIFI have to be supported by Carrier AND the Phone.
My oneplus 7T can open and use VOLTE when traveling overseas if I use local sim.
Our local forum have discuss this issue long time. No solution so far.
Some other phone like xiaomi or so can be supported in Australia. I was wonder why oneplus not.
Flash other country's rom may be ? Is there have a Volte international roaming thing ? So 7T can be pretended a Euro device roaming to Australia and using Volte ?