Hello, for the last couple of days I've been on the hunt for a dualsim smartphone that can receive 3G signal on both of its sims, simultaneously.
At the moment I own a device that can do 3G/2G for sim1, only 2G for sim 2 and I have to use 2x3G sim cards(the provider emits exclusively 3G signal for mobile communications); in this scenario, one sim card is unusable.
Now my question emerges: is there such thing that can certainly(I can't afford to just buy devices that could possibly do this based on ambiguous internet discussions and test them out) keep 2 sims, both 3G, operational simnultaneously(not with the tricky switch, I will be needing to get calls on one of the sims, even if the other goes to standby)?
Thanks!
Related
Is my XDA IIs 3G?
no
it's
not
So if i put a 3G o2 sim card that i have in it what will happen?
You phone will work, that SIM card just enables you to use a 3G phone as well as other non 3G frequencies.
but some operators like the company 3 seem to block their sims from working in non 3g phones
Is the second SIM WCDMA 3G voice capable or is it only GSM as most dual-sim phones out there?
I can't seem to find any information on it, and this is an important piece of data for people living in countries with no 2G GSM network.
The second sim is GSM.
Enviado do meu XT1033
lcdiniz said:
The second sim is GSM.
Enviado do meu XT1033
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In other words, useless for Japan (where all voice calls go over WCDMA and there is no GSM network).
Clarification
evildave_666 said:
In other words, useless for Japan (where all voice calls go over WCDMA and there is no GSM network).
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You are right in that it is useless in Japan. However, just to clarify the issue: Both SIM slots are 3g capable, but the phone forces the SIM card that is not used for data to 2g mode. Only one of the SIMs can be used for data at a time, just as you can only send texts or make voice calls through one at a time so it makes sense in any other country...
What is not clear is whether this is a Motorola decision to save battery or imposed by the chip set used or an Android OS issue. Covia Fleaphone has same issue, and provides a shortcut to switch the active SIM (active=3g enabled SIM), so it seems to be not just a Motorola decision...
A
I believe it has only one 3g radio in it and used by whatever Sim is being used for data So its a hardware issue
Sent from my XT1033 using Tapatalk
jaspreet997 said:
I believe it has only one 3g radio in it and used by whatever Sim is being used for data So its a hardware issue
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Sounds about right... It is a real pity how bad the documentation/specifications info is on dual sim phones. Make it very difficult to pick the right one, several people now claim that the Xperia M2 works with 3g on both SIMs simultaneously, but can't verify this...
At the same time I guess Japan (where I use it) is an unusual case, most places still have 2g, and Japan only recently started selling separate SIMs...
A
Hey guys,
So I have the Z3 Dual, but where I live, we only get 3G network and no GSM, which brings me to my question:
Is anyone working towards a hack to allow my device to run BOTH my Telstra SIM cards in LTE mode without one reverting to GSM?
Thanks in advance,
Phil
Really? No gsm signal or 2g. I think 2g structures are the most basic one that every carrier Has. BecAuse if 3g becomes congested, the subscriber can fall back to 2g. Anyway i guess no hack is on going because of the rooting issues with this plus i think it's a hardware limitation. 2 simcards cannot use 1 modem (the 3g/4g) because that would tax a lot of battery power
Sent from my D6633 using XDA Free mobile app
There are 2 radios in the phone I'm suspecting, since both SIM's run different IMEI numbers (1 per radio) if you check in About Phone/Status and check the 2 SIMs.
So I can't see why this is a limitation.... renders the phone worthless for what I wanted it for (Work sim and Personal sim),
And yes, where I live, there has never been GSM, it was CDMA before the towers were upgraded to 3G (Central Wheatbelt is Western Australia).
Dysstatic said:
There are 2 radios in the phone I'm suspecting, since both SIM's run different IMEI numbers (1 per radio) if you check in About Phone/Status and check the 2 SIMs.
So I can't see why this is a limitation.... renders the phone worthless for what I wanted it for (Work sim and Personal sim),
And yes, where I live, there has never been GSM, it was CDMA before the towers were upgraded to 3G (Central Wheatbelt is Western Australia).
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When you use the first SIM with LTE the second has no signal?
I can't understand if the second sim limit is only for connection or also for 3G bands.
I mean: you can still use the second line on a 3G network only for calls and SMS without using data connection or not? The second line is limited on 2G bands?
thanks for answers I ordered a Z3 Dual 2 days ago
theskig said:
When you use the first SIM with LTE the second has no signal?
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Correct, because the second sim drops down to GSM, which we don't have in rural Western Australia. And vice versa, set the second SIM to LTE/WCDMA and the first SIM drops down to GSM. Meaning, you cannot run 2 SIM's side-by-side unless you live in an area that has GSM/2G still.
theskig said:
I can't understand if the second sim limit is only for connection or also for 3G bands.
I mean: you can still use the second line on a 3G network only for calls and SMS without using data connection or not? The second line is limited on 2G bands?
thanks for answers I ordered a Z3 Dual 2 days ago
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So, you choose either SIM as your data sim. Whichever you choose, that sim runs in LTE mode and the other SIM is used for calls/sms only.
SMS and phone apps both have 2 send buttons labelled 1 and 2, so you can send messages or make calls from either SIM at the press of a button. But only 1 SIM has data active, that is the SIM running in LTE mode.
I have messaged Sony Mobile Developers regarding this, the reply was:
From: [email protected]
Hi Phil,
Thanks so much for your email. We will forward the dual SIM issue you have identified to our internal teams for further investigation.
Best regards,
Developer World
Hope this helps
Regards,
Phil
Dysstatic said:
Correct, because the second sim drops down to GSM, which we don't have in rural Western Australia. And vice versa, set the second SIM to LTE/WCDMA and the first SIM drops down to GSM. Meaning, you cannot run 2 SIM's side-by-side unless you live in an area that has GSM/2G still.
So, you choose either SIM as your data sim. Whichever you choose, that sim runs in LTE mode and the other SIM is used for calls/sms only.
SMS and phone apps both have 2 send buttons labelled 1 and 2, so you can send messages or make calls from either SIM at the press of a button. But only 1 SIM has data active, that is the SIM running in LTE mode.
I have messaged Sony Mobile Developers regarding this, the reply was:
From: [email protected]
Hi Phil,
Thanks so much for your email. We will forward the dual SIM issue you have identified to our internal teams for further investigation.
Best regards,
Developer World
Hope this helps
Regards,
Phil
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Click to collapse
Thanks for infos!
That's weird! If I live in a place with only 2G or only 3G network I cannot use 2 sim cards!
But I remember reading on online user manual that the 2 sims network settings are separated, right? If you force both on the right frequency?
In a few days I'll receive the phone and I'll help you with some tests
theskig said:
Thanks for infos!
That's weird! If I live in a place with only 2G or only 3G network I cannot use 2 sim cards!
But I remember reading on online user manual that the 2 sims network settings are separated, right? If you force both on the right frequency?
In a few days I'll receive the phone and I'll help you with some tests
Click to expand...
Click to collapse
Correct, both sims wont run on 3G at the same time..
Both sims WILL run on 2G at the same time though (GSM).
I'm contemplating a purchase for a Mate 9 with dual SIM capability ( from Kogan Australia). It's advertised with dual SIM. For me, the secondary SIM would only add value if I can use it on 3G, while I keep the main SIM on 4G.
But in some documentation, the secondary SIM only supports 2G. Has anyone successfully used Mate 9 with 4G+3G SIM combination.
andrewsc said:
I'm contemplating a purchase for a Mate 9 with dual SIM capability ( from Kogan Australia). It's advertised with dual SIM. For me, the secondary SIM would only add value if I can use it on 3G, while I keep the main SIM on 4G.
But in some documentation, the secondary SIM only supports 2G. Has anyone successfully used Mate 9 with 4G+3G SIM combination.
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For sure....! I also think 4G+4G can work...
If the Australian version is the same as the European version it will support 2G, 3G and 4G on SIM 1 whilst SIM 2 will support 2G and 3G.
Sent from my MHA-L29 using Tapatalk
3G would be great on SIM 2. The problem I'm trying to solve is that our Australian telco ( Optus ) has severely degraded its own mobile network, to the point where we can't receive voice calls anywhere in our suburb. LTE used to work well, not any more. On the other hand, they improved somewhat on their 3G network. My wife is still in contract with cheap plan. So I could arrange a dual-SIM where SIM 1 is on 4G with another telco, while SIM 2 stays at 3G with the old telco. Things may improve for their network, or the company is going down, we shall see.
4G/3G is how it does it.
Both will support 4G but you'll need to put the switcher setting on your homescreen so you can switch quickly - you can't have both on 4G but both will support it. The other will be able to use 3G.
I verified a very wierd behavior. Even if I selected the 4G on both Sim, the sim not selected for data traffic is always forced to connect to 3G 900MHz. If I go in areas without that kind of coverage that sim becomes unreachable. I can deduct that dual 4G is actually a fake , isn't it?