Korean A5 (2017) – A520S / A520K / A520L – U3 – Convert To Dual Sim firmware needed

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Korean A5 (2017) – A520S / A520K / A520L – U3 – Convert To Dual Sim firmware needed

On July 26, 2019, Posted by , With 3 Comments


kindly share for Korean A5 (2017) – A520S / A520K / A520L – U3 – Convert To Dual Sim firmware. It was FRP problem, so after solve it by combination method and flash by stock firmware it goes to 1 SIM. Customer didnt agree for that and want to 2 SIM edition.

3 Comments so far:

  1. ExpertBuddy says:

    Phone must be rooted Link
    nNeed a gsm software: Z3x, Chimera, Octopus or GCKey
    nMake a phone backup of efs and certificate
    nSteps:
    nConnect your phone to usb (make sure oem unlock and usb debuggin is on)
    nMake DM+MODEM+ADB connection allowed by calling *#0808#
    nRead your phone certificate using a gsm box (in z3x box you go to unlock tab and press Read cert)
    nOpen your phone certificate Along with notepad and duplicate everything seen after IMEI line by copying and adding 2.(example IMEI2, PubSignKey2, etc)
    nWrite back your new phone certificate (in Z3x box you press write cert
    nYour phone is now dual sim
    nMentions:
    nThis won’t change your IMEI so it won’t trigger law in countries where IMEI changing is illegal.
    nIn case you don’t have gsm box or you want to be helped you can contact me.

  2. TechGuru says:

    want combination for a520s u3 for frp

  3. Bo-Rens says:

    kindly to be helped me , i want dual sim a520k but warranty void is 1 , if i want to read cert the octoplus says your knox is not 0 , how can i to read and write cert if the knox is not o , thank you.