The Samsung Galaxy Note20 Ultra came with eSIM support out of the box, but until today it wasn't available.
Recently, Samsung released an update for TMB carriers with an update log that supports eSIM (DSDS).
You can see update doc here: https://doc.samsungmobile.com/SM-N986U/TMB/doc.html
But how to flash update your Samsung Note 20 Ultra to support eSIM
This update applies to version N986USQU2DUC8 which is a version for TMB only. So if you want to use OTA update. You must change the CSC to the TMB region. Note that this update only supports SM-N986U variant
Method 1: Change CSC to TMB then OTA update to version N986USQU2DUC8
If your current version is lower than N986USQU2DUC8 only
Install Google Phone app from Play store
Open Phone app. Set to default Dialer. In the Phone app type *#*#27262826#*#*
then if CSC list shows. Select TMB then Install
After change CSC. Go to Update settings and check for new update and update to version N986USQU2DUC8
Method 2: Clean flash to version N986USQU2DUC8 using Odin
This method need a PC/Laptop and Odin to flash in Download mode
You can do a dirty flash but I recommend backup data and do a clean flash for better performance after update. So please backup all your data
- Step 1: Download N986USQU2DUC8 here: N986USQU2DUC8 TMB
- Step 2: Download Odin
- Step 3: Extract firmware zip, bring your phone to Download mode by Turn off phone then Plugin cable after hold Volume up and Volume down button. Release button after phone in Download mode
- Step 4: In Odin, Select BL, AP, CP, CSC file from its slot then press FLASH
After finish, phone will reboot and may take few mins to finish first boot.
This version supports eSIM, but Samsung may or may not support your eSIM carrier. You can just try or call to Samsung support from your country.
In addition to the eSIM-enabled OTA update, Samsung's new system update also fixes security patches aimed at improving device stability. Although the Galaxy S21 series phones have not yet received support for eSIM cards in the US, international media have said that the OTA update of this phone series will be rolled out in the near future.
The Samsung Galaxy Note 20 mobile phone series was officially released in August 2020. The Note 20 is powered by the Qualcomm Snapdragon 865+ processor and has an upgraded version of the S Pen stylus. The Note 20 uses a 6.7-inch AMOLED display with a 60Hz refresh rate; The Note 20 Ultra uses a 120Hz 2K high refresh screen with a 108MP main camera.
Samfw will not response any brick or problems. Follow this guide at your own risk