Jump to content

Samsung Galaxy S8 & Dual Sim/Duos


Andrew Revering
 Share

Recommended Posts

My original post was intended to just be a question about the upcoming S8's dual-sim possibility... however this thread ended up being the main S8/S8+ thread, so I'm modifying my original post to include some main points that we've gathered about the device and provide some useful resources:
 
Misc FYIs
------------------------------------
  • All MSLs appear to be 000000
  • To force band 41 only (thanks Terrell352):
    ##DATA# MSL 000000 then go to LTE and turn off b25 and b26.
  • ##debug# works on this device (thanks nexgencpu)
    Cleaner way to look at carriers,CA and signal strength etc..
  • Want Root permissions? This will trip KNOX and you won't be able to use Samsung Pay or other KNOX features

 
Carrier/Dual Sim Info
------------------------------------
I have Sprint (obviously), but I have property where the only carrier is AT&T. FreedomPop now has a free AT&T SIM you can buy for limited voice, data & texting, which is perfect for my limited needs when I'm at my cabin. Converting the phone to a Dual-SIM phone then becomes convenient for me with the FreedomPop SIM + Sprint. With that in mind, here is some useful info (including a solution below):
 
  • See what frequencies/networks your phone supports: https://www.frequencycheck.com/
  • All networks are shipping the 'U' version which has support for all US networks but are software-locked. Once unlocked they will work on any US network.
  • Dual Sim version not available in US or UK. The International Dual Sim model S8+ is SM-955FD. You can convert your single-sim US model into a dual sim by 1) unlocking and 2) add a $50 dual-sim adapter from magic-sim or simore (I bought the Simore one and it ripped before I could even try it once. They would not refund)
  • If you are within a contract and/or didn't pay full price for your phone and don't want to wait, you can unlock your phone: https://theunlockr.com/unlock-my-phone/ usually for something like $20. Correction: These unlockers don't work for CDMA Sprint phones. You have to either buy an Unlocked phone or get Sprint to unlock it for you. Correction2: There is at least one guy who knows how to do it! See 'Solution' below.
  • You can convert it into a Dual-SIM by adding one of these: http://www.magic-sim.com/ or http://www.simore.com/  (don't recommend simore, mine tore easily)
  • I found a ---> SOLUTION <--

 

Charging/Cables

-----------------------------
Info from mmark27
 
 
Noteworthy Specs
-------------------------------

 

  • Only difference between S8 and S8+ is screen size and battery size.
  • Bezel free, all screen design
  • No physical home button
  • 5.8" & 6.2" Plus Version
  • 'Infinity' QHD Amoled Display
  • 12mp f1.7 rear, and 8mp f1.7 front cameras, auto focus
  • Wifi Calling
  • Dual Edge Only Display
  • Bluetooth 5.0 for double speed and four times the range
  • 3000mAH (S8) & 3500mAH (S8+) battery, fast charging
  • 4 GB RAM
  • Waterproof
  • 64 GB built in storage
  • Bixby Artificial Intelligence, dedicated button
  • Iris Scanner
  • Pressure Sensitive "3D" Touch home button
  • Wireless Charging
  • Can see screen with polarized glasses, unlike with LCD screens (HTC 10, etc)
  • Always On Display
  • PC Replacement (DEX)
  • Fingerprint sensor on back
  • DOES have a headphone jack
  • USB Type C
  • MicroSD Expansion
  • HPUE compliant, which means it will extend existing signal range by 30%, including indoors!
    • In my limited experience with the device, HPUE DOES work. Maybe it doesn't help speeds, I don't know -- but in 2 locations (in two different states) where I normally have no signal, I can now make phone calls and transfer data with a weak signal that I never had before.

 

 

============================ORIGINAL POST=====================================

 

I'm planning to upgrade to the Galaxy S8 when it's available on April 21st...

 

I would really like a Dual SIM version and have Sprint as my primary carrier and use a FreedomPop ATT SIM as a 2nd option when I'm up at my land which is only covered by ATT.

 

After some research, it seems that the Dual SIM version is the 'International Unlocked' version which does not have the capability of CDMA/CDMA2000 for the 3G/1X portion of Sprint coverage. Since LTE is actually a GSM protocol it has the capability of doing Sprint's LTE, but other services may be limited.

 

Is this correct?

 

If so, that probably means I just want to buy the Sprint version and get one of those little dual sim adapters you can now get like this one: http://www.magic-sim.com/

 

Also, in order to use a SIM from a GSM provider, the phone needs to be unlocked, which outside of contract means I'd either have to wait 2 years, or just buy the full-price phone outright, and then get it unlocked.

 

Then I can use my ATT SIM, but again coverage may be limited because the radios are tuned for Sprint, not ATT. But I think it may be possible for some of their services to work.

 

... does this understanding sound correct? Is there another way I can go about what I'm trying to accomplish?

 

UPDATED:   --> SOLUTION <--

  • Like 3
Link to comment
Share on other sites

If dual SIM capabilities is top priority, then look into the Moto G5 Plus coming later this spring. It's supposed to work with all carriers and have dual sim capabilities. This may be the first ever dual SIM LTE phone for Sprint and Verizon. I was looking at purchasing the phone but it does not have USB-C. (That is a deal breaker as I'm not going through the hassle of replacing my USB cables back to micro USB.)

  • Like 1
Link to comment
Share on other sites

Related to this... I found a really cool site that lets you plug in any phone model and see which networks it's compatible with based on how many frequencies it covers. So it can tell you that you're 'mostly' covered but maybe you're missing a couple LTE bands or something...

 

https://www.frequencycheck.com/

Link to comment
Share on other sites

I really hope that the galaxy s8 is available on april 21st. It has been way too long of a delay and i dont think samsung has to be as afraid of their QC as long as they tested those 2 corner cases of the antennas short circuiting each other and the battery is seated properly. The phone just needs to come out already.

 

Sent from my SM-N920P using Tapatalk

  • Like 2
Link to comment
Share on other sites

  • 2 weeks later...

Wow I am so surprised that the Galaxy S8 thread is not cracking with the Samsung announcement today.  All I gotta say is that it is an awesome phone and it will be my next device.

  • Like 1
Link to comment
Share on other sites

I don't think the 'unlocked' version will fully support Sprint, and if it's not carrier branded probably won't get the updates pushed to the device either. Here are the frequency compatibility of the G955F version, which I think is the same one as what's on B&H:

 

https://www.frequencycheck.com/compatibility/LQJDT58/samsung-sm-g955f-galaxy-s8-plus-td-lte-samsung-dream-2/united-states

 

It's missing the 2G & 3G frequencies for Sprint, so I think that means besides coverage where its only 3G, things like text messaging might not work.

Link to comment
Share on other sites

I can't find specs for this year's S8+, but the Sprint S7 Edge was 100% compatible with TMobile, if you could get it unlocked by Sprint (either out of contract or paid for it at full price). FYI Sprint Variant will end in a P, so model number will be SM-G955P .

 

Look at this: http://www.droid-life.com/2017/03/08/unlocked-galaxy-s8-plus-s8-fcc-smg950-smg955/

The SM-G955U (U is important) is an Unlocked US Variant that will work on all US carrier frequencies, however this version didn't come out until June of last year, so there may be a delay for this to become available. I don't know if the one on B&H is the International Unlocked (F) or the US Unlocked (U) variant. They just say SM-G955 ... which isn't enough information.

 

EDITED: Turns out all carriers have the same U version... SM-G955U. However, I think there is still a software lock on these, but the radios are all the same so they will work on all carriers once unlocked.

 

  • Like 1
Link to comment
Share on other sites

I can't find specs for this year's S8+, but the Sprint S7 Edge was 100% compatible with TMobile, if you could get it unlocked by Sprint (either out of contract or paid for it at full price). FYI Sprint Variant will end in a P, so model number will be SM-G955P

 

Look at this: http://www.droid-life.com/2017/03/08/unlocked-galaxy-s8-plus-s8-fcc-smg950-smg955/

The SM-G955U (U is important) is an Unlocked US Variant that will work on all US carrier frequencies, however this version didn't come out until June of last year, so there may be a delay for this to become available. I don't know if the one on B&H is the International Unlocked (F) or the US Unlocked (U) variant. They just say SM-G955 ... which isn't enough information.

My sprint order is showing g955u

  • Like 1
Link to comment
Share on other sites

... And you pre-ordered from the sprint site?

Yep, through the sprint website.

 

edit:

 

Yes, its also leased.

Link to comment
Share on other sites

I don't think the 'unlocked' version will fully support Sprint, and if it's not carrier branded probably won't get the updates pushed to the device either. Here are the frequency compatibility of the G955F version, which I think is the same one as what's on B&H:

 

https://www.frequencycheck.com/compatibility/LQJDT58/samsung-sm-g955f-galaxy-s8-plus-td-lte-samsung-dream-2/united-states

 

It's missing the 2G & 3G frequencies for Sprint, so I think that means besides coverage where its only 3G, things like text messaging might not work.

There is a UNLOCKED model 955U that works on all Carriers. Last year's UNLOCKED S7 did. It's available on Samsung.com or Best buy.

 

Sent from my 2PQ93 using Tapatalk

  • Like 1
Link to comment
Share on other sites

Does "software locked" mean it won't take a ATT SIM?

Correct. you'll first have to DSU the phone.

 

Sent from my SPH-D710 using Tapatalk

  • Like 1
Link to comment
Share on other sites

Samsung again fails with its limited color choices. You'd think they would offer the coral blue color option from the get-go after seeing how well-received the color was. I'm holding back on getting the GS8P until an unlocked coral blue variant is released.

 

Sent from my SPH-D710 using Tapatalk

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share


  • large.unreadcontent.png.6ef00db54e758d06

  • gallery_1_23_9202.png

  • Similar Content

  • Posts

    • The Kendall/Kerr/Gillespie PCS swap is a very nice win-win for AT&T and T-Mobile. Means both of them will have a 20x20 PCS channel, though in exchange T-Mobile goes from 10x10 to 5x5 on one of their spectrum blocks. I figure AT&T will start running n2 DSS on that channel, as they have enough customers in those areas to need the capacity, while T-Mobile will probably just run B2 LTE, as once Auction 108 finally clears they'll have plenty of n41 to play with. Guessing we'll see the non-G-block 5x5 slice running n25, but it would get aggregated with n71 rather than n41 I figure as n71 will remain 20x20 there until the STA goes away (and maybe after that, as if T-Mobile gets 700 MHz as the result of VZW buying West Central Wireless's spectrum there's no reason to run LTE in 600). Which makes me think that the next move is T-Mobile trading 700A for the 5x5 of orphaned PCS (E block) to VZW once the WCW transaction closes, as that would give VZW 20x20 PCS in the area, and would give T-Mobile 700 MHz in an area where they have none. Then VZW can either trade 700B to T-Mobile as well in exchange for the AWS I block in those areas (gives T-Mobile 10x10 B12, gives VZW 15x15 B66) or they can cut a deal with AT&T to give AT&T 10x10 B12 (AT&T has the lower C block), but I'm not sure what that deal would be if trading like for like (vs. AT&T handing VZW their upper tiny slice of B5, giving VZW 15x15 to play with in that band post-WCW-acquisition). EDIT: Just looked at AWS spectrum again, and if AT&T would rather have 10x10 B12 than 2x 10x10 AWS, they could swap AWS-D for VZW's 700B block. That would give VZW 20x20 AWS, and would take AT&T down to 10x10 + 5x5...which they'd likely be fine with as they have 20x20 PCS, small cells in the busy areas, and as a result of the transaction three 10x10 chunks of spectrum in the area below 1 GHz. And if VZW traded 700A to T-Mobile for PCS-E VZW would have 20x20 PCS as well. Which is quite useful in an area that's macro-only for VZW and likely not dense enough for proper mobile usage of CBRS or C-Band (and an area where VZW doesn't even run DSS now).
    • Yeah, $250 credit for an S22 is awful. tbf last year they didn't have solid upgrade credits until mid-late April, which is when I paid $225 to swap my S21 for an S22. Happy to wait 'til then for that kind of deal, though I'll be annoyed at battery life in the mean time.
    • Miserable upgrade credits from Samsung this year unless you want to rely on carrier financing. Sticking with S22U for a while. 
    • So far we've documented close to 100 Sprint conversions in NYC with permits still rolling in and that's only what we've identified manually. Tons of sites get converted/updated without permits so there's potentially a lot more that we haven't spotted yet. There are also dozens of sites that are still broadcasting the keep PLMN, some have been decommissioned but historically the vast majority have been converted.
  • Recently Browsing

    • No registered users viewing this page.
×
×
  • Create New...