I've been an iPhone user for 5 years now. 3G and 5 versions. I am tired of iTunes I would also like to tinker a bit with my next phone. . I have used Linux as my main desktop os for a few years.
Anyways, I'm on a grandfathered unlimited data plan on att. My iphone 5 has no working power button, the mic is defective and the battery is worn.
I work in construction so i was considering the s5 for its dust rating and removable battery.
I spoke with tmobile today and they told me that any tmobile device, even if bought for full price new on amazon or best buy would be locked to tmobile service. They informed me I would need service with them in order to unlock. If that's the case it rules out buying a tmobile version for the unlocked bootloader.
Does the unlocked version from bestbuy come with the unlocked boot loader?
To clarify I meant the model listed as "Sam G900"
Sayn3ver said:
To clarify I meant the model listed as "Sam G900"
Click to expand...
Click to collapse
Go into settings and in "about device" for the model name. Sam G900 is not a model name.
lingowistico said:
Go into settings and in "about device" for the model name. Sam G900 is not a model name.
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Click to collapse
I'm pretty sure he's just going off what best buy says for the model.
I too am wondering this question. Very disappointed in the new S6, thought it was going to be "the next big thing", turns out they just want to be like apple now.
Side note, where would u recommend buying an unlocked bootloader S5, that has LTE capabilities for att? Or does that not exist in the US? Been searching but coming up empty handed.
Sent from my SAMSUNG-SGH-I337
I don't have the phone I am referencing. Like mentioned earlier, it's just the model number off of best buys webpage. They have the g900a model and a Sam-g900 for sale. They only sell the tmobile prepaids unlocked at a higher price point.
Is there a reputable online seller of new or refurbished unlocked tmobile versions?
I don't know if I wanna gamble buying used.
fals3illusion said:
I'm pretty sure he's just going off what best buy says for the model.
I too am wondering this question. Very disappointed in the new S6, thought it was going to be "the next big thing", turns out they just want to be like apple now.
Side note, where would u recommend buying an unlocked bootloader S5, that has LTE capabilities for att? Or does that not exist in the US? Been searching but coming up empty handed.
Sent from my SAMSUNG-SGH-I337
Click to expand...
Click to collapse
Buy a 900f from ebay. There are tons of reputable sellers there, just look at their feedback score. All qualcomm models support all lte frequencies, however they're not activated by default. There's a guide in general or q&a which shows how to activate all freqeuncies
lingowistico said:
Buy a 900f from ebay. There are tons of reputable sellers there, just look at their feedback score. All qualcomm models support all lte frequencies, however they're not activated by default. There's a guide in general or q&a which shows how to activate all freqeuncies
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Click to collapse
Does the 900f come with unlocked bootloaders? Is there a way you can identify if they have an unlocked bootloader without physically checking the phone just don't want to spend hundreds of dollars and kinda get stuck with a phone that's not what I wanted.
Sent from my SAMSUNG-SGH-I337 using XDA Free mobile app
I just purchased an unlocked GS5 G900T (Tmobile version) from eBay yesterday, and should have it by the end of the week. I've purchased my last 3 phones from eBay, and all have been true to the ad, and in excellent condition.
You do need to study the photos closely though, and make sure the seller has good feed back, and a lot of feedback (I never buy from sellers who have only a few ratings and/or using a new account).
I got this phone to use with ATT and wanted an unlocked bootloader. Kinda wish I knew that you could activate the frequencies on the 900F though, as it seems like most of the development is for that model. Oh well, as long as I can root and have a few choices of ROMs, I'll be happy.
I'll probably be using some sort of stock based rom on this phone (for a while at least).
fals3illusion said:
Does the 900f come with unlocked bootloaders? Is there a way you can identify if they have an unlocked bootloader without physically checking the phone just don't want to spend hundreds of dollars and kinda get stuck with a phone that's not what I wanted.
Sent from my SAMSUNG-SGH-I337 using XDA Free mobile app
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Click to collapse
Yes, the 900f/klte/international has an unlocked bootloader
lingowistico said:
Yes, the 900f/klte/international has an unlocked bootloader
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Click to collapse
ok cool, thanks for all the help!!
I did not know that T-Mobiles Galaxy S5 Came with unlocked bootloaders. I am just going to get one from them since T-Mobile and ATT run on basically the same LTE Basebands and LTE will not be affected as much as the international version when i'm on ATT's network
fals3illusion said:
I'm pretty sure he's just going off what best buy says for the model.
I too am wondering this question. Very disappointed in the new S6, thought it was going to be "the next big thing", turns out they just want to be like apple now.
Side note, where would u recommend buying an unlocked bootloader S5, that has LTE capabilities for att? Or does that not exist in the US? Been searching but coming up empty handed.
Sent from my SAMSUNG-SGH-I337
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Click to collapse
didn't read the rest of the replies but cricket...they sell it with unlocked boot loader, and you can sim unlock after six months...but they are owned wholly by att so you'll have att's reception and reliability. Of course your unlimited data would be history but crickets rates are significantly lower than most other mvno carriers
Edit: the model no is sm-g900az
Sent from my SM-G900F using Tapatalk
I called bestbuy.com customer service. The customer service agent was no help. No additional info than what's provided on the webpage (actual samsung model # is what I was looking for).
She transferred me to their technical support department. The gentleman spent about 5 minutes or so searching and couldn't come up with anything more.
I was told to call an actual best buy store and speak with their mobile department.
I called later today when best buy opened up. Sat on hold for 8min before an actual human being answered the phone. They too were no help. The conversation went like this...
Me: do you know which model of the g900 the sku 5760005 is referring to. . The listed model number Sam-g900 with that sku# is not an actual samsung model number.
Them: it's a g900.
Me: no you do not understand, g900 should be followed by one more letter. Is it a g900a, g900t, g900v, g900f, g900h, etc?
Them: it's a g900. What provider do you have?
Me: I'm on att but probably going to tmobile soon.
Them: we don't carry tmobile. I have a g900a. It works good. (they have the prepaid tmobile s5 on their website).
Me: nvm. Thanks have a nice day.....click.
I see this BOGO offer direct on Samsung's website for Galaxy S8's. In the past, all Galaxy S phones were SM-G920T (T for T-Mobile) SM-G920V (V for Verizon, etc) and then Best Buy sold that piece of crap SIM unlocked SM-G920U that was bootloader LOCKED and couldn't do anything with it.
I'm trying to find out here if the Bootloader is locked on any variant of the Snapdragon 835 S8's, and which version I should get. T-Mobile has the same BOGO offer on the S8 in the form of a rebate as well, but I can't confirm anywhere the specific model number. I'm so jaded by the fact that T-Mobile left the bootloader locked on their S7 that I can't imagine them leaving it unlocked.
The G6 is also BOGO right now as well, but I don't know if that bootloader is unlocked like all my previous LG phones from T-Mo we're.
I'd really appreciate any kind of confirmed answers you might have!
Cheers!
joesee said:
I see this BOGO offer direct on Samsung's website for Galaxy S8's. In the past, all Galaxy S phones were SM-G920T (T for T-Mobile) SM-G920V (V for Verizon, etc) and then Best Buy sold that piece of crap SIM unlocked SM-G920U that was bootloader LOCKED and couldn't do anything with it.
I'm trying to find out here if the Bootloader is locked on any variant of the Snapdragon 835 S8's, and which version I should get. T-Mobile has the same BOGO offer on the S8 in the form of a rebate as well, but I can't confirm anywhere the specific model number. I'm so jaded by the fact that T-Mobile left the bootloader locked on their S7 that I can't imagine them leaving it unlocked.
The G6 is also BOGO right now as well, but I don't know if that bootloader is unlocked like all my previous LG phones from T-Mo we're.
I'd really appreciate any kind of confirmed answers you might have!
Cheers!
Click to expand...
Click to collapse
All the carriers have "U" devices in the U.S. this year. The SIM you initialize the phone with is what carrier's features are added. A "U" from Samsung apparently doesn't take on the carrier whose SIM is used features and remains virgin. So "U" could be considered "universal" or "U.S." It's still a S-835 device which means "U" definitely doesn't mean unlocked bootloader.
I'm not an expert at all but I really doubt that ANY Samsung bootloader will ever be unlocked again. Pretty much after 2013 all bootloaders were locked [AFAIK] at least for the Galaxy series. I really like Samsung devices but my Galaxy Tab S (late 2014) isn't even going to get the Nougat upgrade - this actually pisses me off greatly.
When you see 'unlocked' concerning a phone/device it means CARRIER unlocked, not the bootloader. The 'unlocked' means that you can use it with any carrier that the device supports - so just about most of the carriers/providers in the entire world. Still not sure about this concerning CDMA (Verizon/Sprint) as some things may not work (different bands). Tried using GSM phones on CDMA a few years back and wasn't able to use 4G/LTE & also MMS.
Good luck.
EDIT:
Was typing this as BarryH_GEG replied to your question. Yes the letter following the model corresponds to the various carriers (Verizon, Cricket, Sprint, etc) and are also different for international versions.
EDIT2:
On another note I own a Galaxy S7 Edge (international) that has the Exynos processor that is unlocked. At the same time this is the only device I've never rooted because it works so well for me, no carrier bloatware. Also the only device I've ever purchased without a removable battery. Until the latest updates I was able to go 2 days without charging (not anymore unfortunately). The international S8/S8+ also use the Exynos processor so you might consider this option. However the cost will be high as it was for me when I purchased my GS7edge as you'll need to purchase it directly without any US discounts or such. I paid out just over $700 for my GS7edge directly, though at the same time my AT&T bill is much lower because of this.
I've researched the GS8+ international and it's looking to be around $800. Compared to trading in my GS7edge international for an unlocked US version I can get for $375 (with trade-in) if I do this within a month or so... I can probably get $400 for my GS7edge (since it's international) but how long will this take? If I only get $300 for it for a quick sale I'll still spend $500 for the new 8+ so is this worth it?
Only stating these issues so that you understand my thinking concerning an unlocked bootloader. These are [mostly, still SS stuff] bloatware free, have incredible power, etc, etc. I miss rooting my device but is it really worth it for the cost? I really want the international/Exynos S8+ but still not sure.
Let me know your thoughts, later.
Hi guys.. So I bought a Samsung Galaxy S8 from Best Buy Mobile last month. I had to use sprint because at&t (my fav. carrier) would not finance me on the phone. I was told if I paid off the phone I could switch carriers. So that's what I did. Sprint even unlocked it. Now people are telling me I can't use this certain phone on at&t, or even verizon because it is a cdma phone. No one told me this when buying the phone.
Is it true that I am stuck with sprint?! I have horrible coverage in my area and I can't even use the internet and such unless I'm on a wireless connection. What can I do? Please help!
Did you try putting in a non sprint sim?
If it is SIM unlocked, just flash the unlocked (G950U1) firmware on it.
https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817
KARVEGA79 said:
Hi guys.. So I bought a Samsung Galaxy S8 from Best Buy Mobile last month. I had to use sprint because at&t (my fav. carrier) would not finance me on the phone. I was told if I paid off the phone I could switch carriers. So that's what I did. Sprint even unlocked it. Now people are telling me I can't use this certain phone on at&t, or even verizon because it is a cdma phone. No one told me this when buying the phone.
Is it true that I am stuck with sprint?! I have horrible coverage in my area and I can't even use the internet and such unless I'm on a wireless connection. What can I do? Please help!
Click to expand...
Click to collapse
If the Sprint unlocked your phone, then it won't hurt inserting another sim in it. Theoretically speaking it should work and if it won't, then flashing is another way of making it work.
KARVEGA79 said:
Now people are telling me I can't use this certain phone on at&t, or even verizon because it is a cdma phone. No one told me this when buying the phone.
Click to expand...
Click to collapse
Who are these ignorant people telling you this and why are you listening to them?
1) Verizon also uses CDMA, so having CDMA is the reason it WOULD work with Verizon.
2) All the carriers in the U.S. get the same phone. All the bands needed for a specific carrier are activated when the SIM card is installed. The only reason it wouldn't work is if Sprint had not unlocked the phone after you paid it off. It would be locked to Sprint to prevent you from not honoring the purchase agreement. And even then it would be blacklisted on Sprint network, if you didn't honor the purchase agreement.
3) if inserting the SIM card for another carrier doesn't automatically change the firmware, then do what this guy said:
lancemoreland said:
If it is SIM unlocked, just flash the unlocked (G950U1) firmware on it.
Guide for Flashing Standard Firmware, Carrier Switching, and Flashing Unlocked Firmware
https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817
Click to expand...
Click to collapse
Sprint, at&t and even verizon said my phone wasn't compatible even after I told them sprint unlocked it. I had no idea about all this cdma, gsm crap when buying the phone. I have never had a decent phone like an S8. All my phones have been cheap prepaid phones since now due to the fact no one would ever finance me for one. I was SOO freakin surprised and happy when someone actually agreed to finance me, I figured I could pay off the phone and then switch. After paying off the phone is when these companies said it was incompatible. Weird thing is I went to IMEI.info and it says it IS compatible and IS unlocked for sure. I then went to at&t online and after typing in my imei number it also said it was compatible. I'm so confused. I am going to take it up to at&t tomorrow and see what happens when I buy and insert a sim card. If it turns out to be sim locked is there a way to bypass this? I truly have paid the phone off and after doing so I asked sprint (on the phone) to sim unlock it, they said they did.
Please do not listen to the idiots at the mobile companies. There is ZERO difference in the S8, ZERO!!!!! If It's not sim locked it will work on ALL carriers, both cdma and gsm.
If It's still sim locked, some people have had success paying a third party to provide a code. But I would try sprint first since They said it should be unlocked.
My guess is that it will work fine with another sim card.
I would either flash the att firmware or the unlocked firmware on it.
Sent from my SM-G950U1 using Tapatalk
Should I flash the att firmware before inserting the sim or only if the sim does not work? Also is there a way and should I back up my sprint firmware or should I be ok? Thanks.
KARVEGA79 said:
Should I flash the att firmware before inserting the sim or only if the sim does not work? Also is there a way and should I back up my sprint firmware or should I be ok? Thanks.
Click to expand...
Click to collapse
I would flash the unlocked firmware on the phone. Will get rid of bloatware. No reason to backup sprint firmware, Its everywhere.
Sent from my SM-G950U1 using Tapatalk
ChazzMatt said:
Who are these ignorant people telling you this and why are you listening to them?
1) Verizon also uses CDMA, so having CDMA is the reason it WOULD work with Verizon.
2) All the carriers in the U.S. get the same phone. All the bands needed for a specific carrier are activated when the SIM card is installed. The only reason it wouldn't work is if Sprint had not unlocked the phone after you paid it off. It would be locked to Sprint to prevent you from not honoring the purchase agreement. And even then it would be blacklisted on Sprint network, if you didn't honor the purchase agreement.
3) if inserting the SIM card for another carrier doesn't automatically change the firmware, then do what this guy said:
Click to expand...
Click to collapse
It says this guide is only for snapdragon S8's I have an exynos S8. Is there another guide for that one? Nevermind, IMEI.info said I has an exynos, I guess it was wrong info. CPU-Z says it's a snapdragon 835. I'm assuming the CPU-Z info is the correct info?
KARVEGA79 said:
It says this guide is only for snapdragon S8's I have an exynos S8. Is there another guide for that one? Nevermind, IMEI.info said I has an exynos, I guess it was wrong info. CPU-Z says it's a snapdragon 835. I'm assuming the CPU-Z info is the correct info?
Click to expand...
Click to collapse
You said you purchased that phone from Sprint directly. It's a snapdragon. Exynos is in the international version, which Sprint does not sell.
rkennison said:
You said you purchased that phone from Sprint directly. It's a snapdragon. Exynos is in the international version, which Sprint does not sell.
Click to expand...
Click to collapse
I purchased it from Best Buy Mobile, had to sign with sprint because no other carrier would finance me.
KARVEGA79 said:
It says this guide is only for snapdragon S8's I have an exynos S8. Is there another guide for that one? Nevermind, IMEI.info said I has an exynos, I guess it was wrong info. CPU-Z says it's a snapdragon 835. I'm assuming the CPU-Z info is the correct info?
Click to expand...
Click to collapse
If you bought it from Sprint (or even just used it on Sprint), then you have a Snapdragon 835 S8. Only the Snapdragon variants have CDMA bands for Sprint and Verizon. Only the Snapdragon S8/S8+ variants are sold by carriers in North America -- so they can be cross compatible with Sprint/Verizon/AT&T/T-mobile/Canadian carriers. That's why whoever told you this nonsense is so ignorant.
If you had IMPORTED an Exynos variant from like England, then you would be limited to AT&T or T-mobile. But you have the "universal" Snapdragon model. Now the Exynos variant has an easily unlocked bootloader, which is a reason people import them, but that's another topic altogether.
As long as your Snapdragon 835 S8 is SIM unlocked (you have paid for it in full, and Sprint says they have unlocked it), you can take it to any other carrier or even an MVNO (like Straight Talk) and use it.
---------- Post added at 08:04 AM ---------- Previous post was at 08:00 AM ----------
KARVEGA79 said:
I purchased it from Best Buy Mobile, had to sign with sprint because no other carrier would finance me.
Click to expand...
Click to collapse
If you used it on Sprint, you have Snapdragon 835. Only the Snapdragon S8/S8+ variants have CDMA bands for Sprint and Verizon, in addition to LTE bands.
---------- Post added at 08:26 AM ---------- Previous post was at 08:04 AM ----------
KARVEGA79 said:
Should I flash the att firmware before inserting the sim or only if the sim does not work? Also is there a way and should I back up my sprint firmware or should I be ok? Thanks.
Click to expand...
Click to collapse
Thor2j said:
Please do not listen to the idiots at the mobile companies. There is ZERO difference in the S8, ZERO!!!!! If It's not sim locked it will work on ALL carriers, both cdma and gsm.
If It's still sim locked, some people have had success paying a third party to provide a code. But I would try sprint first since They said it should be unlocked.
My guess is that it will work fine with another sim card.
I would either flash the att firmware or the unlocked firmware on it.
Sent from my SM-G950U1 using Tapatalk
Click to expand...
Click to collapse
Since you phone is paid off, when you go to AT&T, try AT&T Prepaid (formerly called GoPhone). It's really for people who already own their phones.
Same high speed data off the same low-lag data servers used by "contract"/postpaid AT&T customers (with one exception, which I'll warn you about),
same in-store AT&T customer service as contract/postpaid AT&T customers,
same AT&T SIM card as contract/pospaid service. (The store may have SIM cards labelled "AT&T Prepaid", but underneath it's the same AT&T SIM card. If they try to charge you for one, tell them you want the FREE AT&T SIM card. It's the exact same thing.)
Make sure you go to an AT&T corporate store, not a "franchise" store. At the AT&T corporate store they will even give you free AT&T SIM card to use for AT&T Prepaid. (Franchise stores will try to sell you SIM cards.)
The advantage is AT&T Prepaid is much less expensive service than "postpaid" AT&T (contract service). Since you already own your phone in full, all you need to pay for is monthly service. You don't need to pay extra each month so you can get a "free" upgrade to a new phone in 2 or 3 years. (Not free, you are really paying for it with extra fees each month.)
You would want the $45/6GB plan on AT&T Prepaid. Do not fall for the $60 "unlimited" plan. The $45/6GB plan gives you plenty of UNCAPPED high speed data/unlimited calls/unlimited texts. Whereas the $60 plan caps your data speeds at 3mbps to compensate for it being "unlimited". AT&T Prepaid uses same data servers as their AT&T postpaid customers and I get ping speeds often less than 30ms, most often 26-29ms, which is fantastic low lag speed. (Lower pings are better, lower ping speed = less lag). If you go to even a service like Cricket (owned by AT&T, but you won't see any AT&T logos anywhere), they use proxy server farms and you often get triple digit ping speeds (high lag). This is also why Cricket has to use a DIFFERENT SIM card from regular AT&T. Higher ping speeds make it seems like your download speeds are much slower than they are.. due to LAG. Plus Cricket caps ALL download speeds at 8mbps. Until AT&T Prepaid (formerly called GoPhone) introduced their $60 "unlimited" plan, ALL their plans were uncapped high speed data. They didn't cap download speed at all. But now they have started capping speeds with the $60 "unlimited" plan. So STAY AWAY FROM THAT.
With the $45/6GB plan, if you autopay each month, you can save $5 and only pay $40 per month. So, $40 per month for 6GB data, with UNCAPPED low lag data straight from AT&T. Don't let them charge you for a SIM card! AT&T Prepaid uses the exact same SIM card as "regular' AT&T.
If you decide you don't like it, for whatever reason, you can switch to "regular" postpaid AT&T. But since I always pay for our phones in full, I like to save on monthly service. Although there are tons of MNVOs with prepaid service, they all use proxy servers with high lag (high ping speeds). Even AT&T's own Cricket is configured as an MVNO, to compete with MNVOs like Straight Talk. But AT&T Prepaid is not. It's "pure" AT&T, but at budget prices -- which AT&T uses to compete with actual carriers like T-mobile and Sprint.
You can "bring your own phone" , which in this case is your fully paid for Galaxy S8.
How do I know which ones are the corporate stores and which are the franchise stores? I'm looking at the St. Louis map now. Some say at&t authorized retailer and then some just say at&t.
I have a sprint model and I unlocked it.
It works with T-Mobile and gets LTE
It works with att and gets LTE
It works with Verizon my current carrier now and also gets LTE
Highly recommend flashing the unlocked software if you go this route the sprint software with non sprint SIM cards is very annoying.
Sheon849 said:
I have a sprint model and I unlocked it.
It works with T-Mobile and gets LTE
It works with att and gets LTE
It works with Verizon my current carrier now and also gets LTE
Highly recommend flashing the unlocked software if you go this route the sprint software with non sprint SIM cards is very annoying.
Click to expand...
Click to collapse
It worked! Thank GOD! In my room now I get -90/-100 with att and had -100/-125 with sprint. It is using HSPA and I can't find LTE on here to switch over. It stays on 3g, it never goes to 4g or LTE, how can I fix that?
So please tell me what I need to do to delete the sprint crap on here and put att on it. Thanks guys.
Not being rude, but you've been told many times on here What to do , reread the posts.
Follow the directions, we can't spoon feed every little thing.
https://forum.xda-developers.com/showthread.php?t=3625817
Sent from my SM-G950U1 using Tapatalk
Ok, so I want to do the prerequisites - check.
Then just do the carrier switching part and I'm done right?
Do I do all this with the sim card installed or not installed?
Sorry, this is my first time doing this.
Ok, I did what the guide said. During the flashing standard firmware part after clicking start is said FAIL! SHA256 is invalid. I ended up going back into ADB, rebooting and trying a different att firmware download and now the phone works. Weird thing is, I don't see alot of the apps that I had on an old phone with go phone and 4g LTE is not working, it's not even an option. What should I do if I want to wipe clean the phone to stock samsung android, not stock sprint as I bought it. Then I could insert the new go phone sim and it will install those apps and turn on 4g LTE? I'm learning guys, slowly but surely. I love this kinda stuff, so please bear with me here.
KARVEGA79 said:
How do I know which ones are the corporate stores and which are the franchise stores? I'm looking at the St. Louis map now. Some say at&t authorized retailer and then some just say at&t.
Click to expand...
Click to collapse
https://www.att.com/maps/store-locator.html
Authorized retailers are code for "franchise stores". They are not owned by AT&T nor run by AT&T. They do not have actual AT&T employees and they will nickel and dime you for every little item, like SIM cards. Whereas "corporate" AT&T stores will give you free AT&T SIM cards.
When AT&T Prepaid was called GoPhone, event the AT&T stores sold a GoPhone SIM card "kit" that had various sizes SIM cards with plastic shims for $15 -- which was totally unnecessary. I just told them, "NO, I want a FREE AT&T SIM card which fits my phone." And at the corporate stores they have to give it to you. AT&T and AT&T Prepaid (formerly branded as GoPhone) uses the EXACT same SIM cards. It's just they had some "labelled" as GoPhone but underneath it was the exact same thing.
3or 4 years ago, I had a friend buy a brand new Samsung Galaxy phone "on contract" INSIDE an AT&T corporate store, then immediately paid it off with his credit card, and switched to GoPhone -- all in the same visit -- and they did NOT even touch his AT&T SIM card inside his phone. It's just an internal AT&T accounting change. Now GoPhone has been re-branded as AT&T Prepaid to make it less confusing.