4G LTE dual SIM 1800 & 2100 Mhz

[sulasno]

Any recommendations for a 4G LTE, dual SIM (both if possible on real 4G) on 1800 & 2100 MHz costing less than 10k?

Using it as a phone and surfing, not as a camera . Looking at Obi SF1.5 and Xiaomi (cannot remember the model). No OEMs because reviews not enough.

Tia

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[4evermaat]

m.youtube.com/watch?v=v_vttBfgt04

The Asus Zenphone 2/2 laser. Try to get the 3gb/4gb model.

[sulasno]

Thks

will check price tomorrow if possible

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[goldmagpie]

I had not found any phone that does this, so was a bit skeptical of the claims the Zenfone does.

I found one comment on gsmarena saying that the version with Snapdragon processor supports 2G/3G/4G on both SIMs. I have not found confirmation of this claim yet. The comment didn't claim concurrent standby on all, so I'm not yet confident about this phone. But it's the only phone I've heard of that might do this. There is a version with an Intel processor that doesn't have this feature.

[chmod777]

I had not found any phone that does this, so was a bit skeptical of the claims the Zenfone does.

I found one comment on gsmarena saying that the version with Snapdragon processor supports 2G/3G/4G on both SIMs. I have not found confirmation of this claim yet. The comment didn't claim concurrent standby on all, so I'm not yet confident about this phone. But it's the only phone I've heard of that might do this. There is a version with an Intel processor that doesn't have this feature.

Yes, there is at least one Snapdragon phone that can do this - the I-Mobile IQ II.

This phone lists for 4, 444 baht, so the OP could buy two and have change left over.

Here is a composite of screenshots showing LTE on either sim:

Edited January 10, 2016 by chmod777

[goldmagpie]

Show me both SIMs conmected to 3G/4G at the same time, and that's what I'm looking for. Not a phone where you can switch the radios between the SIMs without switching places physically.

In other words, I know of no phone where you can connect to two networks that don't have 2G at the same time. One of the networks will have to have a 2G frequency, or you won't be able to receive calls on both SIM's without choosing which one you want to be available on today.

Maybe I'm wrong and it is possible, but I've seen nothing to indicate it yet. I think it's a case of talking about two different features, so it gets confusing and we get an answer that actually answers a question not posed - in this thread.

[TallGuyJohninBKK]

m.youtube.com/watch?v=v_vttBfgt04to

The Asus Zenphone 2/2 laser. Try to get the 3gb/4gb model.

I've got a 5.5 inch ASUS Zenfone 2 Laser (ZE550KL) that cost about 5000b in Thailand, but I also looked at the smaller 5 inch Zenfone 2 Laser (ZE500KL), both being 16GB / 2 GB models with dual SIM slots and Snapdragon (not Intel) processors.

FWIW, the smaller ZE500KL's manual says its two SIM slots are both LTE capable, but that you only can connect to one 3G or 4G/LTE service/SIM at a time.

However, curiously, the larger ZE550KL's manual (which also applies to the similar ZE551KL) says only its #1 SIM slot is LTE/3G capable, while the second SIM slot is 2G only.

All of the WW version of these phones support both the 2100 and 1800 bands of LTE. The downside to the 5 inch ZE500KL model sold in Thailand is that it comes with a seemingly small 2400 mAh battery, whereas the larger 5.5 inch ZE550KL has a 3000 mAh battery, and that one has been very good on power drain/battery life for me.

Edited January 12, 2016 by TallGuyJohninBKK

[chmod777]

Show me both SIMs conmected to 3G/4G at the same time, and that's what I'm looking for. Not a phone where you can switch the radios between the SIMs without switching places physically.

In other words, I know of no phone where you can connect to two networks that don't have 2G at the same time. One of the networks will have to have a 2G frequency, or you won't be able to receive calls on both SIM's without choosing which one you want to be available on today.

Maybe I'm wrong and it is possible, but I've seen nothing to indicate it yet. I think it's a case of talking about two different features, so it gets confusing and we get an answer that actually answers a question not posed - in this thread.

Yes, I was confused about your statement. It is as you describe, when one SIM is on 3G or 4G, the other will be on GSM. Both SIMS can receive and make phone calls and send SMS.

I am still a little confused though. Since you can only use one data connection at a time, what would be the benefit of both SIMs connected to 3G or 4G at the same time?

[goldmagpie]

Yes, I was confused about your statement. It is as you describe, when one SIM is on 3G or 4G, the other will be on GSM. Both SIMS can receive and make phone calls and send SMS.

I am still a little confused though. Since you can only use one data connection at a time, what would be the benefit of both SIMs connected to 3G or 4G at the same time?

Very simple. You don't need it for data, but for voice,

When 2G is no longer available on two or more carriers in one country, a Dual SIM phone like those available today would be of no use if you were to use both SIMs for voice. You'd need 3G.

Where I am right now, True has abysmal coverage on 2G but excellent coverage on 3G. So even if True were to continue to provide 2G, 3G is much better.

[goldmagpie]

I guess the ideal dual SIM phone in Thailand is one that has 2G and 3G active on both SIMs at the same time, and then optionally 4G active on one. Since voice doesn't use 4G (at least not yet), 3G is what's necessary on both, unless one of the carriers have 2G with good coverage where you need it.

[chmod777]

Yes, I was confused about your statement. It is as you describe, when one SIM is on 3G or 4G, the other will be on GSM. Both SIMS can receive and make phone calls and send SMS.

I am still a little confused though. Since you can only use one data connection at a time, what would be the benefit of both SIMs connected to 3G or 4G at the same time?

Very simple. You don't need it for data, but for voice,

When 2G is no longer available on two or more carriers in one country, a Dual SIM phone like those available today would be of no use if you were to use both SIMs for voice. You'd need 3G.

Where I am right now, True has abysmal coverage on 2G but excellent coverage on 3G. So even if True were to continue to provide 2G, 3G is much better.

Thanks for the information, I understand now.

[RichCor]

Yes, I was confused about your statement. It is as you describe, when one SIM is on 3G or 4G, the other will be on GSM. Both SIMS can receive and make phone calls and send SMS.

I am still a little confused though. Since you can only use one data connection at a time, what would be the benefit of both SIMs connected to 3G or 4G at the same time?

Very simple. You don't need it for data, but for voice,

When 2G is no longer available on two or more carriers in one country, a Dual SIM phone like those available today would be of no use if you were to use both SIMs for voice. You'd need 3G.

Where I am right now, True has abysmal coverage on 2G but excellent coverage on 3G. So even if True were to continue to provide 2G, 3G is much better.

Thanks for the information, I understand now.

It does? That information makes sense??

I've been told that many people in Thailand use dual-SIM phones because their primary network that's supposed to work everywhere for Voice and/or Data... doesn't. So the Dual-SIM is there primarily so they can make and receive voice phone calls when they need to.

When it comes to DATA Internet, a dual-SIM phone's ability is really defined by it's market niche (and what capabilities they put in the phone).

According to Wikipedia: Dual SIM

Passive -- Dual SIM switch phones, such as the Nokia C1-00, are effectively a single SIM device as both SIMs share the same radio, and thus are only able to place or receive calls and messages on one SIM at the time. They do, however, have the added benefit of alternating between cards when necessary.

Standby -- Dual standby phones, such as those running on Mediatek chipsets, allows both SIMs to be accessed through time multiplexing. When making or receiving calls, the modem locks to the active channel; the other channel would be ignored and thus unavailable during the duration of the call. Two examples of Dual-SIM Standby smartphones are the Samsung Galaxy S Duos and the Sony Xperia M2 Dual.

Active -- Dual SIM active phones or dual active phones, however, come with two transceivers, and are capable of receiving calls on both SIM cards, at the cost of increased battery consumption. One example is the HTC Desire 600.

So true dual-SIM function seems to depend on how many network radios the handset/device can run simultaneously. While many handsets are capable of dual-carrier or even multi-carrier (one SIM, accessing multiple frequency spectrums run by the same provider) to gain access to combined bandwidth for faster U/D speeds, most handsets are not capable of doing two SIM multiple provider simultaneous access let alone dual-WAN, so that only leaves you capable of actively accessing a single SIM for Data Internet.

I don't think they're using VoLTE or VoIP over 4G yet here, so the handset still has to have access to a 3G (or 2G) spectrum network-capable radio for voice and probably SMS.

Android Authority recently did a writeup, but most magazines and sites do a horrible job if you wanted to know anything about the actual dual-SIM capabilities of each device.

Best dual-SIM Android phones

Android Authority | by Team AA | 15 December 2015

[sulasno]

Dtac coming up with voice on LTE

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[RichCor]

Yea, I noticed that on the DTAC website

DTAC calling VoLTE

For Handsets: Samsumg Galaxy S6 | Samsung Galaxy S6 Edge | dtac Phone Eagle X

* the iPhone 6 and 6 Plus are supposed to have VoLTE capability, but the DTAC site doesn't mention them.

DTAC 2G / 3G / 4G 1800 / 2100
Coverage Map

Edited January 13, 2016 by RichCor

[agogohome]

I'd challenge anyone to find a better phone for the money than the new HomTom HT6 (made by Doogee). It fits the description of what you need for only $126.99 - 4G LTE, dual SIM on 1800 & 2100 MHz:

http://www.banggood.com/HOMTOM-HT6-5_5-inch-Quad-core-2GB-RAM-16GB-ROM-6250mAh-PE-Fast-Charger-Android-5_1-4G-Smartphone-p-999717.html?p=JQ26191551677201504Z

[TallGuyJohninBKK]

Somehow, particulars of the phone notwithstanding, I can't quite see myself buying something called a Doogee HomTom.

[dddave]

Actually, Doogee phones are an excellent value, nonwithstanding the clumsy name. Don't forget, Samsung once sounded silly also.

Be careful of some of the Xiaomi models being sold inexpensively online such as the Redmi Note 2 which I have. It's a great phone and I like mine but the FDD-LTE only operates on one band here...it is basically set for the Chinese market. You can not use 2 data SIMs simultaneously. I believe the new Redmi Note 3 may be an exception but there are different models of the Redmi Note 3 with different 4G configurations that aren't always clear in the specs offered by retailers. Sometimes one model is sold at the "Redmi -3 Lite" for about $20 additional. That is the model with the more comprehensive 4g.

Edited February 11, 2016 by dddave