New Solutions To Fix “Please Call Me” Error On Galaxy Devices

In the previous articles, we have already shared with you a solution to fix ‘Please Call Me’ error on Korean Galaxy S7/S7 Edge and S8 Plus. However, there are still many users of other Galaxy devices that are also dealing with the same trouble. In addition, the method we wrote is only for older Android versions and is a little outdated.  So, in this post today, we’ll share you a new method to completely fix “Please Call Me” on Korean Samsung Galaxy devices. This new method is shared from Nhat Nam, a developer.

If you are using a Galaxy device from SK Telecom carrier, you might hear about “Please Call Me’ error. Your phone will appear a “Please Call Me” warning if your phone is marked as lost or you break the contract with SK Telecom.

Don’t waste the time anymore, here is how to fix “Please Call Me’ error on your Galaxy devices.

How To Fix “Please Call Me” Error On Galaxy Devices

In fact, fixing ‘Please Call Me’ is not too difficult. We are going to share two cases to do that. But, before proceeding, you have to download the required files first:

“Please Call Me” Fix:  (pass unrar:

S/N Change tool:

Case 1: For Devices With OEM On- FRP ON Without Jumping KNOX

For those devices that can activate OEM Unlocking after flashing combination ROM such as Galaxy S9, S9 plus, Note 9,… it’s quite simple. All you need is to flash the Combination ROM file, enable OEM Unlocking, flash the stock ROM, root your phone and then follow step 6

Step 1: Download and flash combination ROM for your device

Step 2: Once done, open Factory IME

Step 3: Dial *#0808# > Choose DM+ ADB (last option) and then use ADB FRP Tool to bypass FRP on your device.

Step 4: Extract and run the Please_call_me_by_Vnrom.bat file. Wait for your phone to reboot and immediately boot your phone into Download Mode.

Step 5: use Odin to flash the stock ROM on your phone again. Remember to choose 4 files: BL – AP – Home CSC – Userdata. Wait for the process to complete. Once done, keep in mind the requirements below:

  • remove SIM card on your phone
  • DO NOT connect it to a Wi-Fi network
  • Quickly skip the setup steps to log into the Home screen.

Step 6: Go to Settings > Developer Options and enable OEM Unlocking. Next, you need to install TWRP recovery and root your Galaxy phone. Once the process is done, head into Advanced > Terminal and then type in these two following commands:

mkdir EFS

mount /dev/block/mmcblk0p3 /EFS

rm -rf /EFS/sec_efs/sktdm_mem

mkdir /EFS/sec_efs/sktdm_mem

chmod 0440 /EFS/sec_efs/sktdm_mem


That’s all! Exit and reboot your phone.


  • For Galaxy Note 8 devices with bootloader level 4, you cannot make FRP off using ADB FRP tool since Samsung has already upgraded its security layer. So we’ll now show you how to bypass this.

“Please Call Me’ tool will be invalid when your phone is connected to the internet because you cannot mount EFS on the combination ROM. If you turn on Wi-Fi, it will immediately relock. So, what we should do here is switching from CSC to LUC as well as changing S/N without being relocked.

Here is how to do so:

Step 1: Flash the Combination ROM on your phone

Step 2: Dial *#0808# and choose DM+ ADB (last option) to open ADB

Step 3: Run Please_call_me_by_Vnrom.bat file and wait for your phone to reboot.

Step 4: Now, it’s time to change SN.

  • You need to prepare a UART
  • Extract the downloaded S/N Change tool.
  • Next, run the tool and dial *#7284# on your phone
  • Select the COM port and copy commands attached in the file.
  • Next, click on Send and wait for the tool to change SN

Step 5: Once you complete changing S/N, continue to switching from CSC to LUC. To do so:

  • Use 669 tool > open Terminal > select the COM port
  • Copy this command: AT+PRECONFG=2,LUC and paste it into Enter AT Command
  • Click on SEND AT COMMAND and wait for a few seconds.

Step 6: Flash the stock ROM of LG – LUC carrier.

That’s all!

Case 2: Fix Please call me for devices with OEM Off- FRP Off

This case is much simpler. All you need is to install TWRP recovery and follow from Step 6 to fix “Please Call Me” on your Galaxy phones.


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