Dual-Sim, 3G for second SIM - Xiaomi Poco F1 Questions & Answers

Hi want to use this in Australia but a lot of dual sim phones only use 2G for the second sim to stay connected, and Australia turned off all their 2G towers so its pointless in my country, I'm hoping someone has tested and can tell me if the second sim connects with 3G
Cheers.

CasualStarlord said:
Hi want to use this in Australia but a lot of dual sim phones only use 2G for the second sim to stay connected, and Australia turned off all their 2G towers so its pointless in my country, I'm hoping someone has tested and can tell me if the second sim connects with 3G
Cheers.
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It can use 3G.

tnsmani said:
It can use 3G.
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so it can sustain 4G data on the primary sim, and 3G voice/sms on the secondary sim, simultaneously?

CasualStarlord said:
so it can sustain 4G data on the primary sim, and 3G voice/sms on the secondary sim, simultaneously?
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Yes, it can also work with 4G on both sims.

thanks a lot guys

Related

[Q] Does Thunderbolt have a SIM slot?

I've been told that LTE is GSM tech and requires SIM card. HTC is LTE capable device. Can anyone tell me if the Thunderbolt does actually have a SIM slot? or I just have bogus information from people. Thanks.
yes the Thunderbolt requires a sim card
Yes
Sent from my ADR6400L using XDA App
CyberGhos said:
I've been told that LTE is GSM tech and requires SIM card. HTC is LTE capable device. Can anyone tell me if the Thunderbolt does actually have a SIM slot? or I just have bogus information from people. Thanks.
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It sure does.
Can we swap the SIM card between phones without activation? If yes, I will be VZ customer soon.
CyberGhos said:
Can we swap the SIM card between phones without activation? If yes, I will be VZ customer soon.
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as long as the other device is an LTE device and is certified to work on the VZW network then yes
ddarvish said:
as long as the other device is an LTE device and is certified to work on the VZW network then yes
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Sweetttttttttttttttttttttttttttttttttttt. Thanks
ddarvish said:
as long as the other device is an LTE device and is certified to work on the VZW network then yes
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Isn't it LTE just for data, what about voice?
CyberGhos said:
Can we swap the SIM card between phones without activation? If yes, I will be VZ customer soon.
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Click to collapse
What difference does it make, it is not like they charge $35 everytime you activate new device.
My understanding is that LTE is just for data and will be that way for years and for the voice you'll still need to activate the phone (cdma radio).
would swapping the sim work for traveling outside of the country? for use on vacation is why i'm inquiring.
don't think so as it doesn't actually have the GSM radio needed to support it. You can roam in one of the few countries that offer CDMA though.
TheloniousOne said:
would swapping the sim work for traveling outside of the country? for use on vacation is why i'm inquiring.
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Nope. I think you are confusing LTE with GSM. My solution for calling the states when abroad is WIFI calling with Google voice and Sipdroid. If you need to use the phone as a GSM you'll need a GSM capable phone. Verizon does have few global/world phones with gsm radios but not very good choices except maybe the coming-soon DINC2 but it wont be 4g I think.
TheloniousOne said:
would swapping the sim work for traveling outside of the country? for use on vacation is why i'm inquiring.
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The SIM is only for the LTE radio. It only supports data, not voice. And it only supports the 700 mHz band. As far as I know, the US is the only country using that band. And it's most likely locked to Verizon. So, lots of obstacles to using it overseas.
The sim stores all your information on it...3g 4g 1x..without the sim you can only makr emergency calls. So the sim stored more than just the 4g information for your phone to work.
Yep VZW is using a CSIM application by storing all your CDMA credentials also on the SIM card. Think of GSM but the 1X voice protocol is CDMA.
willzzz88 said:
Yep VZW is using a CSIM application by storing all your CDMA credentials also on the SIM card. Think of GSM but the 1X voice protocol is CDMA.
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In other words, probably if you go to a country that has a CDMA network that supports RUIM cards (SIM cards for CDMA), you should be able to pop it in and use it like any GSM customer can with their phones on any GSM network.
As far as I know, only India, Japan, and China have the RUIM support implemented.
When the bionic comes out you can just switch your sim card to it and go.
ruddymart said:
What difference does it make, it is not like they charge $35 everytime you activate new device.
My understanding is that LTE is just for data and will be that way for years and for the voice you'll still need to activate the phone (cdma radio).
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Oh, too bad. I am a phoneholic and change phone very often (sometimes once a month).

Honor 7 - Dual SIM with Dual Data connection 4g/3g

Hi Lads,
I bought an Honor 7 EU, because it was the only one can run two SIM connected to 4G and 3G at the same time also with active data connection. The only limit is that the first SIM must be connected to 4G to allow second SIM linking to 3G networks.
I saw the review on an Italian Blog (by A.Galeazzi on HDBlog) were the phone was on 4G on SIM1, and 3G on SIM2 and was explained also a sort of download boosters which use the two data networks simultaneously.
Unfortunately for me (ut of the box with release b100 and later with updated b121) the phone has always been connected to 2G networks on SIM2.
On a side note, I have a Wind Plan in Italy, that is correctly connecting to 4G Networks, while the second SIM is 3IRL which theoretically should connect to a 3G network Three UK/ITA. Unfortunately the issue is that the second SIM is roaming not on 3 sister Network but in 2G on a different network.
This for me is a big deal because with 3 IRL I have free calls and sms even when roaming (3 Like Home), as long as the phone is connected to a sister network (ergo 3ITA or 3UK). I use 3IRL for work, this means i'm an heavy users, so it is vital that the second SIM is on a sister network (3Italy/3UK) to avoid crazy roaming charges.
By the way, on the SIM 1, I would also like to have the data from Wind Italy in 4G, when staying in Italy, so I can get connected to 4G network in Italy and UK and Ireland.
How can I fix? Anyone out there who can help or point me in the right directon?
Dubliner972 said:
Hi Lads,
I bought an Honor 7 EU, because it was the only one can run two SIM connected to 4G and 3G at the same time also with active data connection. The only limit is that the first SIM must be connected to 4G to allow second SIM linking to 3G networks.
I saw the review on an Italian Blog (by A.Galeazzi on HDBlog) were the phone was on 4G on SIM1, and 3G on SIM2 and was explained also a sort of download boosters which use the two data networks simultaneously.
Unfortunately for me (ut of the box with release b100 and later with updated b121) the phone has always been connected to 2G networks on SIM2.
On a side note, I have a Wind Plan in Italy, that is correctly connecting to 4G Networks, while the second SIM is 3IRL which theoretically should connect to a 3G network Three UK/ITA. Unfortunately the issue is that the second SIM is roaming not on 3 sister Network but in 2G on a different network.
This for me is a big deal because with 3 IRL I have free calls and sms even when roaming (3 Like Home), as long as the phone is connected to a sister network (ergo 3ITA or 3UK). I use 3IRL for work, this means i'm an heavy users, so it is vital that the second SIM is on a sister network (3Italy/3UK) to avoid crazy roaming charges.
By the way, on the SIM 1, I would also like to have the data from Wind Italy in 4G, when staying in Italy, so I can get connected to 4G network in Italy and UK and Ireland.
How can I fix? Anyone out there who can help or point me in the right directon?
Click to expand...
Click to collapse
Have you found a solution ? I have two 3UK sim cards and can't use them both, have to switch between them. Please let me know, thanks!
Dubliner972 said:
Hi Lads,
I bought an Honor 7 EU, because it was the only one can run two SIM connected to 4G and 3G at the same time also with active data connection. The only limit is that the first SIM must be connected to 4G to allow second SIM linking to 3G networks.
Click to expand...
Click to collapse
Are you sure this is the case? As far as a I knew the Honor 7 EU can run one SIM on 3G/4G and the other on 2G only when both SIM's are in the phone at the same time. It's the Chinese version which allows 3G/4g on both SIM's at once (and has 64GB internal storage). I could be wrong but I'm sure someone else can clarify.
GrandMasterPlank said:
Are you sure this is the case? As far as a I knew the Honor 7 EU can run one SIM on 3G/4G and the other on 2G only when both SIM's are in the phone at the same time. It's the Chinese version which allows 3G/4g on both SIM's at once (and has 64GB internal storage). I could be wrong but I'm sure someone else can clarify.
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never had two sim in my eu honor, but only one sim can do 4g, and the other i think it is 3g and not 2g
correct me i am wrong
Any updates on this? Can any phone actually run 3G/4G or at least 3G/3G at the same time? (or full autoswitch on call to 3G?)
I'm interested in the voice part only, for both cards to be 3G, without having to manually switch. 4G/3G would be a bonus
GrandMasterPlank said:
Are you sure this is the case? As far as a I knew the Honor 7 EU can run one SIM on 3G/4G and the other on 2G only when both SIM's are in the phone at the same time. It's the Chinese version which allows 3G/4g on both SIM's at once (and has 64GB internal storage). I could be wrong but I'm sure someone else can clarify.
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how tell you Chinese version allows 3G/4g on both SIM's at once ( I have 64GB internal storage ) this not correct. the chinese version the same EU version not diffecult .
I have this problem. SIM1 connected 4G, SIM2 can only use 2G. Phone was bought in Beijing. Settings allow you to make either one of them but not both triband.
Second SIM is not connecting properly unless i switch the setting to allow SIM2 slot to be triband enabled. Then i get on, but the SIM1 becomes useless for data.

Is 1+X dual sim active?

Is 1+X dual sim active?
Sent from my LG-H815 using Tapatalk
According to the official site it's DualStandby.
"Go anywhere and be connected. Your OnePlus X is unlocked and capable of using dual standby SIM cards with 4G speeds right out of the box. You have the freedom to use it all over the globe, no questions asked." https://oneplus.net/in/x
Dr.Weed1 said:
Is 1+X dual sim active?
Sent from my LG-H815 using Tapatalk
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Yes, I'm using two simcards. :good:
Also check with your service provider before you buy! I just got OPX and put in my korean and my austrian sim card....and well, surprise! The 3G network here in Korea (and apparently in Japan) does not allow 2 active sim cards in one phone. I'm screwed...
Jep, its working.
knauji said:
Also check with your service provider before you buy! I just got OPX and put in my korean and my austrian sim card....and well, surprise! The 3G network here in Korea (and apparently in Japan) does not allow 2 active sim cards in one phone. I'm screwed...
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I wonder why is that
khandelwalgaurav said:
I wonder why is that
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I asked and got this answer from UNDERkg on youtube: It's not the matter of allowing or not. Dual SIM phones only support one 3G/4G at a time at which the other SIM gets to only pick 2G signals up. Korean networks do not have compatible 2G networks and therefore the secondary SIM has no signal for itself.
I knew that korea had no 2G network but the OPX description says something like 'dual sim 4G standby' or that's what I understood. so I thought it would be working in korea...
There seems to be a bit of confusion here. I'm very curious to know if the Oneplus X is dual sim ACTIVE?
To be clear there are basically two types of dual SIM phones, active and standby. Standby means you can only use one SIM at a time, so you have to switch back and forth. Active means you can use both SIMs at the same time. In other words you can receive a call on either SIM without switching.
I need to know if the Oneplus X is active or standby.....thanks

Standby SIM | 2G Only?

The preferred SIM is able to pick anything from 2G to 4G, but that causes the standby SIM to have only 2G as a "Preferred Network Type" option.
Is this normal behavior? I made sure the documentation didn't limit the radios on the standby SIM before getting this phone because my one of my carrier does not support 2G, only GSM and LTE.
The SIM works great if I select it as the preferred SIM since it then goes on 3G, but goes back to "Emergency Only" when not preferred.
Is this a hardware limitation on the chipset? I know some other phones are like that (ZenFone 2 for example) but it clearly specifies that limitation on the box. I was expecting both sim cards to be on 3G.
That's dual sim dual stand by on 4g you mean? Forget about it is only marketing on this phone and much other. I have 2 sim from same provider and both 4g or 3g but only one work at same time another has no service same on my LeTv x600. ?
Sent from my x600 using Tapatalk 2
It seems there is much confusion about the DUAL SIM. Maybe I can help... If you insert 2 SIM Cards the following happens, you must choose which card SIM1 or SIM2 will be used for Data Services. Both slots support LTE but only one can be active at the time. Otherwise, both SIM Cards are indeed active (means they support calls and SMS) however the SIM that is not used for Data Service will be "only" shown as GSM (G) while the other will show LTE (4G) in the status bar. Since most providers use GSM for phone calls anyway (regardless of the data connection) your SIM should work both as active and second. Having said all the above, yes, the option for the standby SIM is only 2G - which is really GSM for that matter (or G in the status bar).
GGranello I am not agree with you. In my case provider is not over 2G service only 3G and 4G and have only 2100 band so one of two SIM is with NO SERVICE (of course I can choose The active SIM) but both doesn't work in same time. And for video calls 3G is needed am I wrong? I want to say that on GSM you can't make video calls.
Sent from my x600 using Tapatalk 2
mr.claude said:
GGranello I am not agree with you. In my case provider is not over 2G service only 3G and 4G and have only 2100 band so one of two SIM is with NO SERVICE (of course I can choose The active SIM) but both doesn't work in same time. And for video calls 3G is needed am I wrong? I want to say that on GSM you can't make video calls.
Sent from my x600 using Tapatalk 2
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Mr. Claude, my description was meant to explain the way the Phone seem to handle the dual SIM. If Your provider supports ONLY calls over 3G and 4G than you will be out of luck using that SIM as secondary. My (I agree limited) understanding is that GSM providers must support GSM calling in any case but that may be no longer the case. I have used the Phone with 2 SIM cards for quite some time now, one with LTE for Data and the other for Calls and SMS and I had no issues. I have not tried any Video Calls as the prices are quite high here, it is my understanding that you need a 3G (or better) connection for those. And even with Android 6, the P9000 does not seem to support VoLTE calling either.
Yes I am agree with you that this phone does not support VoLTE but neither two 4G or 3G SIM from same Network Provider working together or "DUAL STANDBY"
I have owned a number of dual SIM phones and all of them supported 2G/3G/(4G) on one SIM but only 2G on the other. Before the latest MTK SOCs, it was generally the case that SIM slot 1 would support 2G and 3G (and maybe 4G) and slot 2 only 2G. Now it is possible to swap the SIM functions via the settings menu, but one of the SIMs will still be restricted to 2G.
If your SIMs are both from a provider which doesn't support 2G, like Hutchison Three in the UK, then I'm afraid you will only be able to use one of them at a time. There may be dual SIM phones that support 2G/3G/4G on both SIMs at the same time, but I haven't come across one.
Yep me don't even knowing or heard about one phone that's working with both SIM cards on 4G in same time and actually have 3 phones in my hands all 4G and dual SIM and not work either with 2 SIM on 4G in same network.
Sent from my x600 using Tapatalk 2

ZTE nubia z9 max network/sim issue:please advise if custom rom may help?

hi folks
i picked up this phone the other day. I have a 4g sim required and verified by network. The handset supports the network bandings available in my country.If i put a sim card into sim slot 1 i get a message saying : "this is not a 4g telecom sim" and sim allows me to enter my sim security pin but nothing else. Sim card works in sim slot 2 but as 2g only. I should be getting 3g/4g and no idea why.... any ideas please?? was wondering if cyanogenmod or an alternative rom would fix this issue? thank you in advance.
Hello,
which sim you are use ? and which rom you currently use ?
Thanks for trying ti help.I'm using Meteor Mobile network 4g sim in Ireland and its stock software android 5.0 model nx512j
Is your device supports LTE. But please verify by network is band of Network is supports your device or not. May be your device is not support 4G LTE band with your sim.
Ye mate. Handset supports 4g and 3g 2100mhz which is compatible in my country and sim card has 4g in another handset I tested.
Lordspectre said:
Ye mate. Handset supports 4g and 3g 2100mhz which is compatible in my country and sim card has 4g in another handset I tested.
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Ok friend. Please send me a error pics so i can more help you
​When we put it into sim1 we get (image attached) but in sim2 we get full gsm coverage + 2g internet.Tested sim in other phone I have an get 4g + 3g on it so sim and network is fine...Even the company I bought the phone off of says it should have no problem working in my country. My sim is a 4g sim verified by my mobile provider.Thank you.
I wonder if installing cyanogenmod would fix the issue?
As per error msg your sim is not 4G try to renew your sim if still YOU get same error then hard reset your cell if still its not works then go for cyanogen mod.
Lordspectre said:
I wonder if installing cyanogenmod would fix the issue?
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May be your issue will be solved. Because problem is in your sim.

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