Dual-SIM Simultaneous 4G/3G Capable Phones...

Hi, just to share results of my research on dual-SIM, simultaneous 4G/3G capable phones.

Do note that there are confusing and ofttimes purposely misleading terms; there are differences between:

• the use of FDD-LTE vs. TD-LTE (sometimes misleadingly referred to as "dual LTE")
• the ability to switch the "primary SIM/slot" (which has LTE/4G+/4G/3.5G/3G capabilities) with the second/secondary slot without physically swapping the SIM cards (refer to misleading/misinformed information within the OneNote notebook as linked, from no less than one of Singapore's leading telcos)
• the ability to simultaneously maintain a 4G/3G connection on both SIMs

Before we start seeing responses in this thread from people asking:

• why would you need 2nd SIM to be on 3G at the same time?
  • simply because there are countries that:
    • will be shutting down their 2G networks (e.g. US, AU, SG)
    • have service providers that do not run 2G (i.e. GSM) networks at all (e.g. CA, JP, KR)
• why would you need two data connections?
  • There is a difference between: data connections and voice connections over 3G; if your phone is currently on LTE/4G+/4G and both your handset or your service provider/current service cell tower is not VOLTE-capable, make a phone call and you will note the connection "drops" to 3G (voice).
    • (caveat: there may be some people that want dual/separate data paths for different apps, but I believe those to be in the minority and not the target/purpose of my research)

The "crop" of "current" generation dual-SIM capable phones in wide-spread markets from the "big guns" (e.g. LG G5, Samsung Galaxy S7 and A 2016-series) cover points #1 and #2, but fail on point #3.

Legend:

• highlighted in green background: arguably best in class
• highlighted in red background with white text: arguably worst in class (or does not meet the needs of this article; i.e. "4G + 2G only")
• red text: warning/of detrimental note
• "question marked": unsure/unchecked

For the bands and the countries, that is for my internal reference only, covering most of the countries of my concern; please use that as a guide; I will not entertain requests to add more countries (as it will be a herculean/endless task).

Do note the table is incomplete (those with question marks); particularly I stopped bothering about other aspects if I confirmed it was not simultaneous 4G/3G capable. If you know of any other simultaneous 4G/3G-capable phones, please let me know to add them, but please stick to "current" phones (i.e. announced/released from 2015 or preferably mid-2015 onwards) and please also provide at least two other "official" references confirming said capability (and please do not use two "sources" that circularly-reference each other or the same "source").

NOTE: I have not stated nor verified VOLTE, either on SIM #1 or switchable primary, which is another point of interest for me; if you have any information, please let me know as well.

Thanks!

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