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:
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
Galaxy S8 or Galaxy S8+
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 <--
Info from mmark27
Remember only buy stuff that's been approved by Benson Leung, the Google Engineer that tests tons of USB-C items. You can search him on Amazon. USB-C crappy products can fry your phone and start fires.
From what I (mmark27) understand, the phones are only Quick Charge 2.0 compliant officially. They may pick up QC 4.0 compliance at some point as the chip supports it, but for now QC2.0 is the safe bet.
choetech fast charging pads don't work
Seneo fast wireless charger do work
micro-female to male USB-C
USB-3.0 to USB-C
Wireless charging pads that look just like the ones at Best Buy from Samsung
Pleson fast charging pads work with S8 and S8+
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
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
64 GB built in storage
Bixby Artificial Intelligence, dedicated button
Pressure Sensitive "3D" Touch home button
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
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.
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?
I was at the basset mall yesterday and noticed that band 41 showed up with unusually low DBM signals. The other 2 sites that are marked are 3.4 miles apart which at the mall usually results in phone bouncing back and forth. Now the site on airway does have band 41, but when connected to it it's at much higher DBM signals...
So I ran a speed test in the areas and some really high speeds it said I was connected to a mini macro, but when forcing the phone on band25 it connected to a site much further away .... The area in the past has been a dead spot
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