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    rich hathaway's Avatar


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    Default Sprint gs4 l720t (triband) NG5 unlock for t-mobile/att guide here!!!!

    This is for domestic unlock of the sprint galaxy s4 L720T which is the triband variant on 4.4.2 NG5

    I will assume you have some wireless programming basic knowledge so I wont spell out every small detail, if there is something something you dont "get" then ask or google (not in that order please) lol.

    [hide-thanks]

    What you will need:

    a rooted L720T on 4.4.2 NG5---duhhhh

    Knox removed or disabled.

    odin--most versions will work ok.

    usb cable for your phone

    Current version of Root Explorer

    some basic programming knowledge

    your spc

    cdmaws or dfs or ww

    a brain-- lol

    ok so first set your phone to RUIM with the tool of your choice, then reboot.

    now we need to downgrade the modem like we do for the regular L720, for this we will use the MK5 modem.bin file I have provided, or if you have the tarball for mk5 just open with 7zip and grab the modem.

    load it into odin in the pda slot, I used 3.04 but I think any 3xx will work.
    if odin doesnt see the bin file put this in the file name in windows explorer *.*
    then it will see all files. dont check any boxes, let odin run just as it opens.

    after you load the bin verify you are on MK5 now.
    then load and run SSU.apk then reboot.

    go to the dialer and dial *#0011# and press the menu button then select key input and put 3 in there, once that opens press menu and select back until you are at Main Menu from there if you are not there already.

    Select CDMA, then 1.COMMON, press next page

    twice until you reach page three of COMMON and

    select 8.PREF MODE SET and select GSM_WCDMA_ONLY



    Now Press menu and back until you are at the main

    menu and select [1]UMTS then select [1]DEBUG

    SCREEN, then select [6]PHONE CONTROL, select [2]

    FAKE SECURITY CONTROL and make sure it is set to

    ON.

    Now Press menu and back and select [3] NAS CONTROL.

    Only change what I have listed here.


    [1] CIPHERING CONTROL = OFF
    [2] INTEGRITY CONTROL =ON
    [3] SIM CLASS CONTROL = UMTS
    [4] REVISION CONTROL = DO NOT TOUCH
    [5] RRC(HSPA) CONTROL = DO NOT TOUCH
    [6] DUALMODE IMPROVEMENT CONTROL= DO NOT TOUCH
    [7] NAS AVOID SECURITY CONTROL= OFF, 0
    [8] BIP BLOCK = 1

    Now Press menu and back twice, you should be on the

    PHONE CONTROL menu. Select [7] NETWORK CONTROL,

    select [1] GFC and make sure that it is set to

    [1]GSM/(E)GPRS/WCDMA REL8


    Press menu and back and select [2] BAND

    SELECTION and select GSM Band Preference now select
    /GSM ALL for GSM band preferences.

    Now press back until you get to NETWORK CONTROL again.

    Under the NETWORK CONTROL menu we just came

    from select [4] AQUISITION ORDER and change it to

    [3]UMTS_GSM

    This next step I dont think is necessary but its in the guide for L720 so I am including it here also, it wont hurt.

    Now reboot and load up Root explorer and go to /system/build.prop and long press it and select open in text editor and add this to the bottom (also set the app as read/write)

    ril.sales_code=LOL
    ro.csc.sales_code=LOL

    now reboot with your sim card in and you should have service for talk and text.

    To get data simply ad an apn for your carrier and set as active


    [Only registered and activated users can see links. ] <-----SSU.apk


    [Only registered and activated users can see links. ] <-----Root Explorer.apk crack

    [Only registered and activated users can see links. ]

    credit to aalytim for sprint samsung unlocker apk
    and nicotheandroidguy since some of this is taken from the L720 unlock he worked on.

    [/hide-thanks]

    Hope I didnt forget anything lol, I just did this this morning and am going from memory for alot of this.

    Also the unlock sticks if you wish to upgrade back to NG5
    Last edited by rich hathaway; 02-12-2015 at 07:44 PM.
    Custom tools and custom phone & mifi firmwares built to your specs.Contact me !

    I WILL NOT ANSWER SUPPORT QUESTIONS THRU PRIVATE MSG.
    See mifis.us for $5 unlimited data on vzw (Resellers welcome)

    www.mifis.us <--get yer unlimited data mifis here


 

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