Samsung Galaxy S20 Series

The Samsung Galaxy S20 series was the first Galaxy S generation to support eSIM. However, eSIM availability is not universal across all S20 variants. The most important distinction: the Galaxy S20 FE comes in two completely different hardware versions with different eSIM capabilities.

Key Takeaways

• Galaxy S20, S20+, S20 Ultra: eSIM supported (non-China variants).
• S20 FE 5G Snapdragon (US, model SM-G781U): eSIM supported.
• S20 FE 4G Exynos (international, SM-G780F): NO eSIM hardware.
• Chinese mainland variants of all S20 models: NO eSIM.
• One active eSIM at a time (not Dual eSIM).

Does the Galaxy S20 Support eSIM?

The S20, S20+, and S20 Ultra support eSIM in most markets. Chinese mainland variants are the exception — these use dual physical SIM and have no eSIM hardware.

Galaxy S20 FE: critical variant difference. Samsung released two separate S20 FE models:

• S20 FE 5G (SM-G781U): Snapdragon 865, sold in the US — eSIM supported.
• S20 FE 4G (SM-G780F): Exynos 990, sold internationally — NO eSIM hardware.

These two phones have the same name but different chipsets and different SIM capabilities. If you purchased an S20 FE outside the US, it is almost certainly the Exynos 4G model without eSIM. Confirm your model at Settings → About phone → Model number.

Galaxy S20 Models and eSIM Compatibility

How to Activate eSIM on Galaxy S20

1. Open Settings.
2. Tap Connections, then SIM Card Manager.
3. Tap Add Mobile Plan.
4. Select Scan Carrier QR Code and point your camera at the Roamix QR code.
5. Tap Confirm and wait for the eSIM to install.
6. In SIM Card Manager, set the Roamix eSIM as your preferred data SIM.

Using Two Lines on Galaxy S20

Galaxy S20 supports one active eSIM alongside the physical nano-SIM. For travel:

• Physical SIM (home carrier): Calls and texts. Data disabled.
• Roamix eSIM: Preferred data SIM. Data Roaming on.

Manage your SIMs at Settings → Connections → SIM Card Manager.

Galaxy S20 eSIM for International Travel

Roamix works with any unlocked Galaxy S20 that has eSIM support on its variant. Purchase a plan, scan the QR code, and your Samsung connects to local networks when you arrive.

Carrier lock check: Settings → General Management → Device Information → IMEI status. Contact your carrier to request an unlock.

Galaxy S20 eSIM Troubleshooting

"Add Mobile Plan" missing on S20 FE: Check your model number at Settings → About phone. If it starts with SM-G780F, you have the Exynos 4G model — it has no eSIM hardware and cannot be unlocked to support eSIM. The eSIM version is SM-G781U (Snapdragon 5G).

"Add Mobile Plan" missing on S20, S20+, or S20 Ultra: Carrier lock is the most common cause. Contact your carrier to unlock. Also check if your model is a Chinese mainland variant (model number ending in a C suffix) — those have no eSIM hardware.

eSIM installed but no signal abroad: Confirm Roamix is set as the preferred data SIM in SIM Card Manager. Enable Data Roaming for the Roamix SIM. Toggle Airplane Mode on/off to reset network registration.