need help!! network locked phone - Galaxy Grand Prime Q&A, Help & Troubleshooting

Hey friends I got a new Grand Prime as a gift, but the problem is that it is network locked. I have Rooted the phone successfully. I want to that if I flash firmware will the network lock go away.
P.S. - I have downloaded the firmware via SAMSUNG PHONE INFO App.

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Hi everyone,
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will it still be unlocked or the IME will be corrupted and the code i have won't be usefull . i won't be using it on t mobile so i need it to be unlocked.
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[Q] Help regarding SM-G900P

Hey everyone, I been looking around the forums here and other sites and have learned a lot of info in pieces but I really need help with a particular issue. A friend of mine gave me a Sprint Galaxy SM-G900P (Galaxy S5) which is (of course) CDMA with GSM compatibility. Im unsure at the moment what service he was wanting to use but I know it is a GSM carrier (US) because he has a SIM he wanted to use. I owe him a favor so I told him I would try. Besides going the route of purchasing a unlock box and unlocking the phone with that, I discovered the SSU apk which SIM-Unlocks the phone. I downgraded the phone from Lollipop 5.0 stock to Android 4.4.2 KitKat (G900PVPU1ANE5) with ODIN. (FYI, i was stuck in download mode with no recovery mode for a week before finally getting one to work, and so happen to be that version that went through)..... I downloaded SSU and it unlocked the phone and I switched mobile network mode from CDMA to GSM Units. (NOTE: it says 4.4.2 and up will not work with USA carrier SIM cards without downgrading the Modem but I have not tried just yet) Im about to Root the phone but here is where my question comes in. I have read of people flashing roms to get their phones to work with certain carriers and other functions. Will rooting help me out at all? I guess IM asking if there is a ROM that I can flash onto the phone to enable the use of whatever carrier he is wanting to use with it. I know thats most likely useful in the situation, but Im awaiting that answer as we type. ANY help would be greatly appreciated ))) Thank you all.
Anyone? :/

No AT&T or T-Mobile Service with SM-G900FD After Marshmallow Update

I recently purchased a used SM-G900FD that worked with both TMobile and AT&T when I looked at it. I checked the IMEIs but then things got weird.
I wondered why it was still on Kit Kat and wasn't updating OTA, so after some reading I downloaded Phone Info. I noticed two things, S/N was 00000000000 and it was rooted. So I downloaded Odin, and I think I downloaded the correct firmware.
I am now in 6.0.1 but the phone info now says it is not rooted and I can't get service from AT&T or T-Mobile. Do I need to be rooted to get service?
What did I do wrong? I hadn't used it because I was waiting on a case and wireless charger, but I broke my zenphone 2 screen today and need to start using the S5 ASAP.
I am new to rooting, so any help is greatly appreciated.
A few other things I should mention.
Phone Info "Country of Origin" is blank.
And the firmware's CSC code is CAC.
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Again, new to this so any help is appreciated.
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So I bought my friend a used S5 Neo on ebay, but it seems the phone has been tampered by the previous owner which wasn't mentioned in the description.
This is the link to the auction of the phone: http://www.ebay.com/itm/201698895221?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT
I'm trying to help her reflashing the factory image. There is some things I know and don't know,
What I do know is:
- It is a SM-G903W (from Canada)
- the UPC is: 887276127293
- Attempting to update the phone to the latest OTA update failed
What I don't know is:
- The CSC of the phone or installed firmware
- The Region or Carrier the phone originally came with
- if it was originally locked or unlocked or has been unlocked afterwards
Is there a way to find this out when the phone is not able to boot? download mode obviously still works.
I already messaged the seller and I'm waiting for an response.
Also I am in Germany and can help my friend only over chat or voicechat.
Nevermind. Kies fixed it all.
Data is lost or still intact?
Hi bro. what hppened to your data?
nex86 said:
Nevermind. Kies fixed it all.
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