For reasons beyond this forum's scope, I need a dual-sim phone. One line would be my current T-Mobile line, and the other would be provided by another carrier. As a result, i can only use an unlocked dual-sim phone. The HTC One Dual Sim (http://www.htc.com/in/smartphones/htc-one-dual-sim/#specs) has that feature, plus a great features list, including being capable of 1080p video and MHL output.
The HTC One Dual Sim specifications list the following network signal compatibilities:
SIM1: Up to HSPA (900/2100 MHz) and up to EVDO REV. B(800 MHz)
SIM2: Up to EDGE (900/1800/1900 MHz)
Would it work with T-Mobile?
What about 4G LTE?
You would get edge in SIM 2 but that is is from what those specs say.
I have never had a dual SIM phone.
Are both active on the same time?
Yes. These phones are popular with people who travel a lot. There is a small market in the US, as well, for those who need a work line and a personal line, but don't want to carry two phones.
Edit: the quote part came out wrong; I apologize for the confusion.
Just never looked one up.
And with the quote, that's all good.
Seems like that happens on allot these days.
Thanks for your reply. With regard to your question about both SIMs being active at the same time, here is the answer.
A new generation of Dual SIM Phones, called "Dual SIM Dual Standby" (DSDS) provide the ability to have 2 active SIM simultaneously waiting for a call (ore ready to make one), using only one transceiver. This means the phone supports dual simultaneously-active SIMs but only in Standby mode. In simple words, when none of the SIMs are used then both the SIM’s are active but when you are using a particular SIM the other SIM becomes inactive. In dual standby if a person is using SIM 1 and another person is calling on SIM 2 they will hear the message “not reachable, try again later”, or go directly to voice-mail depending on how the carrier handles that event.
Also, for dual standby phones that support 3G, when the 3G / 2G network is used the other SIM becomes inactive. While you are downloading a big file or watch a streaming YouTube video, the other SIM will be unreachable.
That us good to know.
I learned something today.
do you mean 1900/2100mHZ or 900/2100mhz? it may work for tmobile if you will be using the sim 1.. but it's not guaranteed ..
just make sure that you have the correct APN's ..
Thanks for participating.
The HTC One Dual SIm's specificaions (as listed by HTC One dual sim Overview - HTC Smartphones ) are:
... so it is 900/2100mhz on SIM1, not 900/2100mhz
With regard to the document you referenced (https://community.t-mobile.com/docs/DOC-2168), I could not access it.
It seems like the frequency that is missing from the HTC One Dual Sim is the 1700mhz.
Wikipedia states that this is the frequency used by Tmobile to transmit 4G LTE signals. Is this coorrect?
Source: T-Mobile US - Wikipedia, the free encyclopedia
yes.. for 4G LTE frequency, the access point name (APN) that you should have for your SIM1 should be < fast.t-mobile.com > or pls check this document for the configurations ..
https://support.t-mobile.com/docs/DOC-1979 - this one is accessible through tmobile support .. it should work for as long as there is 4G/LTE tower on your area..
here;s the document for the link i provided to you earlier.. This is for the disclaimer, https://support.t-mobile.com/docs/DOC-1265
Thank you so much for your answers. Sorry for the inconvenience, but I am a little confused.
You wrote ... it should work for as long as there is 4G/LTE tower on your area.. However, the HTC One Dual Sim is missing the 1700mhz frequency, which from what I understand (or failed to) is part of the Band IV, necessary to access 4G LTE services.
Band IV (used by Tmobile for 4G LTE signals) is comprised of the 1700mhz and the 2100mhz frequencies. Am I correct?
Do you need both frequencies to enjoy 4G LTE services? Or is it enough to have only one of them? The HTC One Dual Sim has the 2100mhz frequency. Would that suffice? Or is this one of those deals where one frequency is for download and the other for upload? Is the 1700mhz absolutely necessary to access 4G LTE services?
Please, someone set me straight about the nature of Band IV signal. Being that there are two frequencies in band IV, it is hard to tell if they both are the same thing; just there are two frequencies to increase coverage, or if each frequency is used for specific purposes within the 4G LTE service (like upstream/downstream).
You are correct.. the reason why i told you about the tower is that, some parts of US may not have a 4G or LTE coverage yet. Just for your expectations.. Again, just as long that you have the correct apn settings, your phone should have the coverage for 4G/LTE .. sorry, maybe i told you too much information..
Yes, the 1700MHz band is used for the uplink and the 2100MHz band is used for the downlink. Phones that have the 2100MHz band only will not work on T-Mobile.
https://support.t-mobile.com/docs/DOC-4988 - 4G overview .. this may help..
Thanks for your answer. That, as simple as you stated it, is not clearly stated in any of the documents I have read.
Thanks for bearing with my learning curve. I would rather be told too much
If 21stnow is correct, and the 1700MHz band is used for the uplink while the 2100MHz band is used for the downlink; how would the HTC One Dual Sim could enjoy coverage for 4G/LTE if it is missing the 1700MHz uplink frequency, regardless of whether I set the correct apn settings?
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