Database Users

Anyone have experience with SIM unlocking services?

Hi, I am currently with AT&T but would prefer purchasing a t mobile S7 outright and unlocking it for use on AT&T. Anyone have any experiences with unlocking services?

Yap, I remember using https://www.unlockunit.com/ last year, charged me ~$20 for AT&T S6 Edge, and it worked.

Unlocking
I have used these guys a few times with success
Quick phone unlock dot com

don't know about ATT but with Tmobile, unlock codes do not work anymore. atleast for the s6

galaxy s7 edge unlock sim request
do any one know how to unlock sim for galaxy s7 sprint provider trying to switch to metro pcs

marese310 said:
do any one know how to unlock sim for galaxy s7 sprint provider trying to switch to metro pcs
Click to expand...
Click to collapse
Try these guys - www.cellunlocker.net. I've been using them for a long time and they've always come through for me.

Sim-unlock.net
Did mine last night

i have used cellunlocker.net before and they have been 100% able to unlock what i had. i even made the mistake of buying twice for some reason but they refunded me the 2nd one without me even asking. it's the new tmobile unlock app i havent tried yet. i tried getting them to unlock my tmobile s6 before but after a day or two they said they couldnt do it because of the new system and refunded me and i never tried again. but looks like they figured it out for the s6. i would try it but there is no way for me to test if it works. every sim i have and can borrow is tmobile

I wanna buy now a Sprint, Galaxy S7, and use it on the Verizon network, because Verizon has less capabilities to play around with software. but Verizon is still the better service, so I wanna stick to them, so does anybody know if Sprint still locks their LTE phones? And will it work 100% on the Verizon network, and how will it work internationally on the GSM network, can someone please educate me in this Subject?

Try this service: www.unlockradar.com if you want to unlock your Glaxy S7. Customer support is very responsive and they can asist you at any time.

Help with s7 edge carrier

Hi guys,
I live in New York and I'm using Cricket wireless services (they are using AT&T's antennas),
I want to buy the s7 edge but its lock for the "big" carriers: verizon, at&t and sprint.
Is there any way that I can buy the phone unlocked from somewhere, or buy the phone from one of the carriers and unlock it so I can use it with Cricket?
Thank you!

You can buy it from AT&T or T-Mobile and unlock it we can confirm that as we've unlocked many for customers to use on other networks
but if you want to just buy it unlocked maybe check online you can buy a factory unlocked version online or at the samsung store

SamsungCodeSource said:
You can buy it from AT&T or T-Mobile and unlock it we can confirm that as we've unlocked many for customers to use on other networks
but if you want to just buy it unlocked maybe check online you can buy a factory unlocked version online or at the samsung store
Click to expand...
Click to collapse
Thank you, how do I unlock it if I buy it from them?
Do I have to pay through one of those unlocking websites?

yuvalshabt said:
Hi guys,
I live in New York and I'm using Cricket wireless services (they are using AT&T's antennas),
I want to buy the s7 edge but its lock for the "big" carriers: verizon, at&t and sprint.
Is there any way that I can buy the phone unlocked from somewhere, or buy the phone from one of the carriers and unlock it so I can use it with Cricket?
Thank you!
Click to expand...
Click to collapse
I bought a LOCKED Sprint S7 Edge on eBay (they don't blacklist locked devices)...... I paid $6 thru eBay remote unlock service and the device has worked like a charm for three past 8-9 months.
Unlocked on eBay are usually a little cheaper.... if sellers account/device is paid up then all you'll need to do is put in new carrier SIM to unlock. (Mine wouldn't work so I ordered that remote unlocking service.... guy was amazingly fast, professional and very helpful.
Good luck!

Switched to Tmobile with my AT&T S7 edge how will I receive updates?

How will i get software updates now that my unlocked AT&T S7 edge now that I'm on Tmobile with it?

I'm in the same situation.
Sent from my SAMSUNG-SM-G935A using XDA-Developers mobile app

I just got rid of my AT&T edge and got a tmobile one, I wasnt about to go to best buy and get updates all the time like I was told by samsung

You need an AT&T sim it doesn't have to be activated. Im using mine on cricket and got my latest OTA by putting my deactivated AT&T sim and using my wifi to download. I did have to check twice and reboot once to trigger the update. If you change the time in settings up a day you don't have to wait 24hrs to recheck for update.

AndreaCristiano said:
How will i get software updates now that my unlocked AT&T S7 edge now that I'm on Tmobile with it?
Click to expand...
Click to collapse
I have an unlocked AT&T S7 Edge and use it both on Rogers and AT&T, I simply change the SIM depending on where I am. The updates still come from AT&T regardless of where I check for them.

Sword Fish said:
I have an unlocked AT&T S7 Edge and use it both on Rogers and AT&T, I simply change the SIM depending on where I am. The updates still come from AT&T regardless of where I check for them.
Click to expand...
Click to collapse
you have an unlocked phone, the updates come from samsung no matter what sim is in the phone.

Milimbar said:
you have an unlocked phone, the updates come from samsung no matter what sim is in the phone.
Click to expand...
Click to collapse
No, I have an AT&T phone that I unlocked and my updates come from AT&T.

Sword Fish said:
No, I have an AT&T phone that I unlocked and my updates come from AT&T.
Click to expand...
Click to collapse
Fair enough.
You still get your updates when you have the AT&T sim in the phone.
I do not have AT&T service at all and am totally unable to get any updates.

Milimbar said:
Fair enough.
You still get your updates when you have the AT&T sim in the phone.
I do not have AT&T service at all and am totally unable to get any updates.
Click to expand...
Click to collapse
I am in Canada with my Rogers sim installed and received the latest update from AT&T on Friday last week. I have received multiple updates from AT&T when in Canada with my Rogers sim installed since getting this phone.

Sword Fish said:
I am in Canada with my Rogers sim installed and received the latest update from AT&T on Friday last week. I have received multiple updates from AT&T when in Canada with my Rogers sim installed since getting this phone.
Click to expand...
Click to collapse
I have been unable to get even one update on 4 phones with a Cricket Wireless SIM in.
I dont understand it, AT&T Owns Cricket, you would think it should work without any issues.

I have a very interesting question regarding on using tee AT&T variant of this phone on the T-Mobile network. As you may have noticed, AT&T is finally offering Wi-Fi Calling on their network, and this phone is compatible. My question is:
Does the T-Mobile Wi-Fi calling work on the AT&T variant of this phone?
Does the AT&T Wi-Fi calling work on the T-Mobile variant of this phone?

If you flash the U firmware, you'll get wifi calling, VoLTE, and OTA updates. There is a thread in one of the other AT&T forums that has instructions.
http://forum.xda-developers.com/showthread.php?t=3411451
Sent from my SM-G935U using XDA-Developers mobile app

You could also go another route and flash the t-mobile firmware on the at&t variant, it works quite well and is the equivalent of the U firmware with t-mobile account management, voice mail, and features.

I have s7edge at&t ..it don't have any volte option
I want to enable volte option. On my mobile
If i flash sm-935U on my at&t will it activate VOLTE OPTION

If you switched to TMobile just ODIN the Tmobile Firmware and you will get the updates OTA.

how do i flash the tmboile firmware to my at&t s7 edge.. i have a att s7 edge and want to flash tmobile firmware to it and use on tmobile with wifi calling and the works.....any links with instructions and firmware. thanks

maddytech said:
I have s7edge at&t ..it don't have any volte option
I want to enable volte option. On my mobile
If i flash sm-935U on my at&t will it activate VOLTE OPTION
Click to expand...
Click to collapse
Yeah you do, its under Connections/Mobile Networks/Mobile Data its called Enhanced LTE services....I actually shut mine off and its saving quite a bit of battery it seems and I havent even noticed a difference in phone call quality, seems kind of useless

you need to get or buy a Gophone simcard or buy a gophone (comes with Gophone simcard), just activate the gophone simcard, you dont need to pay money on it. i never able to get att software update using Cricket simcard but when i put a activated gophone simcard (no need to pay money on it), it lets me update to the latest att firmware ! funny, how gophone and cricket are owned by parent company att but gophone lets me update and cricket can NOT.

S8 sim unlocked

I'm curious if our S8's are sim unlocked. I have the Verizon S8, I put my T-Mobile sim card in and had no problems. Calls, Text and data are all working perfect. The only change I made was from LTE/CDMA to LTE/GSM

Rtrevizo78 said:
I'm curious if our S8's are sim unlocked. I have the Verizon S8, I put my T-Mobile sim card in and had no problems. Calls, Text and data are all working perfect. The only change I made was from LTE/CDMA to LTE/GSM
Click to expand...
Click to collapse
Verizon's are always sim unlocked.

I'm trying to sim unlock my tmobile s8 for when we go to France for 2 months. I'm French but live in the US for 10 months out of the year.

GCbard said:
I'm trying to sim unlock my tmobile s8 for when we go to France for 2 months. I'm French but live in the US for 10 months out of the year.
Click to expand...
Click to collapse
What's the T-Mobile unlocking app say? I've never seen or used it but I heard they unlock it if and when you qualify.

mehdi_s82 said:
Verizon's are always sim unlocked.
Click to expand...
Click to collapse
WOW, I never knew...thats good to know. Looks like all my devices from now on will be Verizon

GCbard said:
I'm trying to sim unlock my tmobile s8 for when we go to France for 2 months. I'm French but live in the US for 10 months out of the year.
Click to expand...
Click to collapse
There's an app in the Google Play Store that will unlock your T-mobile phone from the T-Mobile unlock app. I used it for my S7 Edge. Paid $28 & in an hr I was permanent unlocked. The app is IMEI Unlocker

On the original Jump 1.0 on a business account and have been able to SIM unlock all my phones on payment plans the min I left the store. Have had every Galaxy release except for the Note 7 and they all were SIM unlockable. My S7 Edge didn't SIM Unlock on day 1 though. Waited a day or two and was able to SIM Unlock it, just randomly tried it. My S8 I have not been able to SIM unlock it yet, but this is the first time I pre-ordered online and haven't sent in my S7 Edge back yet.

mehdi_s82 said:
Verizon's are always sim unlocked.
Click to expand...
Click to collapse
Does it mean that there's no activation at all? Should it work out of the box?
I've went to Verizon store and they told me that I must use 3 months of prepaid in order to "activate" it properly.

Anyone noticed that the essay on verizon is a SM-G950U....and not a SM-G950V Like all previous models ....
U is the unlocked US version

rcatank said:
Anyone noticed that the essay on verizon is a SM-G950U....and not a SM-G950V Like all previous models ....
U is the unlocked US version
Click to expand...
Click to collapse
All the versions (T-mobile, AT&T or Verizon) are SM-G950U, you can see this on Samsung Page, the only differences are the latest letter where they change for each version. Because of this there were people guessing that it was exactly the same phone with different software, which you should be able to change as you decide wit any other company software and activate all the bands. Like I mentioned only a gossip base on the model SM-G950U
---------- Post added at 02:42 AM ---------- Previous post was at 02:32 AM ----------
voodoodror said:
Does it mean that there's no activation at all? Should it work out of the box?
I've went to Verizon store and they told me that I must use 3 months of prepaid in order to "activate" it properly.
Click to expand...
Click to collapse
I bought the Verizon version, because of the unlock, to be use in my country Mexico and I can confirm that you dont those 3 months to activate and be able t use your phone. As soon as I received it I inserted my sim card and the only thing i noticed was the cell phone showing a message that phone wouldnt be usable until properly activated, I ignored it and continue and my sim worked normally i was able to make phone calls, use LTE data..... something to consider is that when i reboot the cell phone i dont get this msg anymore but just a notification over my notification bar from the verizon config wizard saying that my sim is not from verizon but as soon as i close it it doesnt came back until you reboot again. The only complain is that i just found out that I cannot update the firmware through OTA because it seems to try to use the verizon servers and are not able to validate my phone because it was never activated on Verizon. So i guess i have to wait for the firmwares or updates to be available on Samsung and install them using ODIN.

rcatank said:
Anyone noticed that the essay on verizon is a SM-G950U....and not a SM-G950V Like all previous models ....
U is the unlocked US version
Click to expand...
Click to collapse
Yup, you just open the box put the sim card and it works.

Rtrevizo78 said:
There's an app in the Google Play Store that will unlock your T-mobile phone from the T-Mobile unlock app. I used it for my S7 Edge. Paid $28 & in an hr I was permanent unlocked. The app is IMEI Unlocker
Click to expand...
Click to collapse
Should have checked, just paid 75 dollars for unlockriver

If I flash the Verizon firmware to a sprint S8 phone could I use it on AT&T?

Rtrevizo78 said:
There's an app in the Google Play Store that will unlock your T-mobile phone from the T-Mobile unlock app. I used it for my S7 Edge. Paid $28 & in an hr I was permanent unlocked. The app is IMEI Unlocker
Click to expand...
Click to collapse
I used the same but it asked me to pay $55, I don't know how you got it for just $28. Maybe they increased price

GCbard said:
Should have checked, just paid 75 dollars for unlockriver
Click to expand...
Click to collapse
Do you have any updates with your order. imei-unlocker.com had to cancel my order because there were delays and no ETA at the moment. I wonder if unlockriver are successfully doing it.

Is my sprint S8 seriously locked to sprint FOREVER?!

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.