I was wondering and thinking; I went to unlock my sgh m919 phone using The process involves getting into Service Mode on your Galaxy S4 by typing “*#27663368378#” and I noticed settings for SIM cards and CDMA. Is it possible by tweaking these settings if you can put a Verizon sim or Sprint SIM card in this galaxy 4 and it work. This version of this galaxy s4 coverage a large range of frequencies? Any one brave enough to try it?
Ok so I was trying to unlock this samsung s 4 mini lte SPH-L520 but it seems like it's the only model of S 4 mini that i can't find an unlock code for, is this phone un-unlockable? and what is the difference between the SPH-L520 and all the other samsun s 4 mini?
Well one rather big difference of the Sprint S4 mini (SPH-L520) versus the international models (GT-I919X) is that it uses CDMA networks rather than GSM. I am not sure if you can use it on GSM networks with a sim card. I do, however, know that the Verizon version (SCH-I435) which is also CDMA can be unlocked and used on GSM networks. I used the app RegionLock Away from the play store (and here on xda) to unlock and it worked with an AT&T sim card.
Sent from my SCH-I435 using xda app-developers app
I hope your help
shadowanubis said:
Ok so I was trying to unlock this samsung s 4 mini lte SPH-L520 but it seems like it's the only model of S 4 mini that i can't find an unlock code for, is this phone un-unlockable? and what is the difference between the SPH-L520 and all the other samsun s 4 mini?
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Friend also want to unlock the samsung galaxy s4 mini sph-l520, tell me if you managed to do so and if the method by region lock app I run away and if you could explain to me hcer to also do so. I hope your answer and thanks for the help in advance
sprint sph-l520 NOT a worldphone
I talked with the Sprint folks.
The Sprint variant has a sim tray that is just for the data sim (UICC card) not a GSM sim. And it is NOT a worldphone.
So even if you put a GSM sim in it, the radio is not looking for GSM towers (only CDMA).
But the Verizon version IS a world phone, which is why "wiisixtyfour" was able to unlock his.
That being said, since Samsung has made several versions that do have this capability, it seems possible that if someone modifies these things it could work:
-Modified sprint radio to receive GSM radio frequencies/signals (maybe copying the Verizon one?)
-Modified PRL to look for GSM towers
-Modified SIM tray communication to recognize not just DATA sims but GSM sims as well
I have no idea how to do any of these. But would love it if someone a lot smarter than me can take a stab at it. :cyclops:
supermaxkato said:
I talked with the Sprint folks.
The Sprint variant has a sim tray that is just for the data sim (UICC card) not a GSM sim. And it is NOT a worldphone.
So even if you put a GSM sim in it, the radio is not looking for GSM towers (only CDMA).
But the Verizon version IS a world phone, which is why "wiisixtyfour" was able to unlock his.
That being said, since Samsung has made several versions that do have this capability, it seems possible that if someone modifies these things it could work:
-Modified sprint radio to receive GSM radio frequencies/signals (maybe copying the Verizon one?)
-Modified PRL to look for GSM towers
-Modified SIM tray communication to recognize not just DATA sims but GSM sims as well
I have no idea how to do any of these. But would love it if someone a lot smarter than me can take a stab at it. :cyclops:
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Please do
SPH-L520 can run on GSM carrier!
Yes, this is what Sprint told me last summer. But it's incorrect. I have a Sprint S4 mini that works on both Sprint and a TMobile MVNO. Voice, text, data (in refarmed area). Unlocking GSM can be done!
supermaxkato said:
I talked with the Sprint folks.
The Sprint variant has a sim tray that is just for the data sim (UICC card) not a GSM sim. And it is NOT a worldphone.
So even if you put a GSM sim in it, the radio is not looking for GSM towers (only CDMA).
But the Verizon version IS a world phone, which is why "wiisixtyfour" was able to unlock his.
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Click to collapse
avgtuhm, that's only true if you can explain how it was done and it can be replicated.
What does #0111*NETWORKCODE accomplish?
First off, my apologies if I am in error about GSM functioning on my phone.
I will explain what I've done with my Sprint S4 mini and maybe you/someone can tell what is happening. But this is why I thought GSM was/is working on my phone, until supermaxkato questioned this. (Note: I am not a developer.)
My S4 mini is active with Sprint. If I put a GSM SIM in it, of course it does nothing. Try to make a phone call and I get an automated message that it cannot be completed. But after doing the following, I can make calls, send texts, use mobile data.
I powered on with GSM SIM in phone. Entered #0111*NETWORKCODE for my phone in the dialer and hit call button. After this voice, text, data work. However, phone shows "Invalid SIM" in the notifications and the calls and texts come from my Sprint phone vs. the number associated with my GSM SIM. (I didn't realize this until testing last night.)
So did the code just make it so the SIM tray ignores the GSM SIM and functions on Sprint network? (again.. before entering the codes, no calling/texting/data worked with GSM SIM in the phone)
Same results on 2 activated Galaxy phones. Unsuccessful on non-activated S4 Mini.
I am not tech savvy but if anyone wants me to check something on my phone, I will try to get you the information. (I do not have a rooted/modified phone.)
Again, sorry for my mistaken report of success. In retrospect, I should have known it couldn't be that easy.
(Earlier this year, I WAS told by a developer in Colorado that there has been limited success with Sprint S4 minis being unlocked for GSM both internationally and domestic. And a Sprint rep recently told me that this phone can be unlocked internationally for GSM, although I see that it is not on their list of unlockable phones.)
mobile tower problem
mobile network is disabled in my phone samsung galaxy s4 mini sprint spark meid:99000437598028
how to fix this
OK so I have a Galaxy Grand Prime (locked to Cricket) that gets 3+ bars LTE at my home. I recently got an AT&T (locked to AT&T) Galaxy S3 (I747) off of eBay to use on Cricket. Since both AT&T and Cricket both use AT&T's LTE network I expected it to work without a problem. However when I put the Cricket SIM in the S3 I can only get 2G EDGE network. I have tried different APNs, network modes, even a couple custom roms. I have no idea what the problem might be.
Any help would be much appreciated
What bootloader and modem are on the phone? Not sure if either of those things will keep you on edge.
(I posted this in both the T-Mobile Note 3 and AT&T Note 3 forum)
So, every once in a while it will connect to the T-Mobile/MetroPCS (I have MetroPCS but since MetroPCS uses T-Mobile Towers, it (SHOULD) work and has in the past)
On my Samsung Galaxy Core Prime that I bought from the MetroPCS Store, it works absolutely perfectly.
It always is connected to the T-Mobile network.
But this phone, Samsung Galaxy Note 3 (AT&T -- BUT I flashed Alliance Rom for T-Mobile, so it has a T-Mobile ROM) will not connect. As I've said before, if I get it at the right time, which is completely unpredictable and restart my phone it will connect but 10 minutes later it will disconnect and tell me "Selected Network (T-Mobile) is Unavailable"
Before, when I had the stock ROM (Lolipop AT&T) it did the same thing Except when it disconnected it would tell me "Phone not allowed MM#6"
The IMEI is valid and not blocked.
I do have service
I manually set the carrier to T-Mobile and also quick note when I click "Search networks" it only gives me T-Mobile, AT&T and Virizon (But it does only these three on my Core Prime too)
This phone IS UNLOCKED
and my Sim card is also Unlocked
And also, I have tested another Samsung Galaxy Core Prime's Sim card with this phone ( I have this phone, and one of my family members does too and also has MetroPCS )
It did the same thing
THOUGH when I tested with my other family members Cricket SIM card, it worked Perfectly!
Cricket, uses AT&T Towers from what I remember. So this makes me think that the phone, since it is AT&T it will connect to AT&T over everything else no mattter what I do. So,
Do any of you think buying a T-Mobile varient of this phone (Note 3) would fix the problem? Instead of this AT&T varient?
If I put my sim card in my Core Prime, turn it on then turn it off and put it in my Note 3, it will connect for a couple seconds.
ANY HELP -- Would be appreciated.
Something I forgot to say, I also tested this with a Blu Studio Energy 2 (It is not carrier specified) and had the same problem. It would work but sometimes it wouldn't and there was no way to guarentee it not disconnecting, and no way to put it back on the network that I knew of it just happened at random
Hi all, new here and phone ignorant.
My parents wanted new phones this past Christmas and they like Samsungs. They had Galaxy S3's and so I bought them 2 new Galaxy S9's, model SM-G960U1. They worked great out of the box. I moved over their ATT Straight Talk sims and they have had no issues. They live out in the country and these phones get great reception.
Fast forward to last week I decided to order the same for myself. The phone that arrived was a Galaxy S9 model SM-G960U. I stuck in my ATT Straight Talk SIM and at first thought everything was OK. But, then realized the phone is missing Volte, wifi calling, and gets horrible data coverage and very weak voice service in the country.
Is there anything I can do to fix this, like flash the firmware? Am I stuck with it? Should I try returning it?
Thanks!
Flash it to U1 (unlocked) as your phone currently has "U" firmware (originally carrier locked). Read this thread to see how: https://forum.xda-developers.com/galaxy-s9/how-to/how-to-flash-u1-firmware-to-device-t3765200 . My S9 is an AT&T variant and I flashed it to The unlocked US variant and I use it on Simple Mobile. Wifi calling works, cellular data and cell signal - everything works perfectly.