Sony Xperia 1 Series
Sony Xperia 1 IV through VII support eSIM. Japanese carrier (docomo/au/SoftBank) firmware variants may show the eSIM menu but fail activation with non-Japanese providers. Requires international unlocked firmware. Path: Settings → Network & internet → SIMs → + → Download a SIM instead.
- eSIM slots1
- Physical SIMYes
- eSIM-onlyNo
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The Sony Xperia 1 series (IV through VII) supports eSIM on the international/unlocked variant. One active eSIM at a time alongside the physical nano-SIM. The critical Sony-specific caveat: Japanese carrier firmware (docomo, au, SoftBank) may show the eSIM menu but actively reject non-Japanese eSIM providers during activation.
Key Takeaways
- Xperia 1 IV, V, VI, VII: eSIM supported on international unlocked variant.
- Japanese carrier firmware variants: eSIM menu present but third-party eSIMs (including Roamix) may be rejected.
- Activation path: Settings → Network & internet → SIMs → + → Download a SIM instead.
- Carrier unlock required — but Japanese devices may also need firmware change.
Does the Sony Xperia 1 Series Support eSIM?
Yes, on the international/unlocked variant. Starting with the Xperia 1 IV (2022), all Xperia 1 flagships include eSIM hardware.
Japan carrier firmware warning: Xperia 1 devices sold in Japan through docomo, au, or SoftBank use carrier-specific firmware that may restrict eSIM to Japanese carrier profiles only. Even after SIM unlock, the firmware may reject non-Japanese eSIM provider profiles. If you bought your Xperia 1 in Japan with a carrier contract, you may need to flash the international (non-carrier) firmware to use Roamix. This is a Sony Japan firmware behavior, not a hardware limitation.
Sony Xperia 1 Models and eSIM Compatibility
| Model | eSIM Slots | Physical SIM | eSIM-Only | Released |
|---|---|---|---|---|
| Xperia 1 IV | 1 | Yes | No | 2022 |
| Xperia 1 V | 1 | Yes | No | 2023 |
| Xperia 1 VI | 1 | Yes | No | 2024 |
| Xperia 1 VII | 1 | Yes | No | 2025 |
How to Activate eSIM on Sony Xperia 1 Series
- Open Settings.
- Tap Network & internet.
- Tap Mobile network.
- Tap Add eSIM.
- Select Scan QR code.
- Scan the QR code sent by Roamix to your email.
- Follow the on-screen prompts to complete the installation.
- Set the Roamix eSIM as your preferred data SIM.
- Turn on Data Roaming in the settings for the Roamix line.
Sony Xperia 1 eSIM for International Travel
Roamix works with any unlocked Xperia 1 running international firmware. Purchase a plan, scan the QR code on Wi-Fi, and connect to local partner networks on arrival.
Carrier unlock check: Settings → About phone → SIM lock status. Contact your carrier if locked.
Troubleshooting Sony Xperia 1 eSIM
"Add eSIM" or "Download a SIM instead" missing: Check Settings → Network & internet → SIMs — if the + icon is absent, your device may be carrier-locked. Contact your carrier to unlock.
eSIM activates but shows "Activation failed" or profile rejected: This is the Japan carrier firmware issue. Docomo, au, and SoftBank firmware on Xperia devices may reject non-Japanese eSIM profiles even after SIM unlock. You need the international non-carrier firmware. Contact Sony Japan support or search XDA Developers for your specific model's firmware flashing guide.
eSIM installed but no data abroad: Settings → Network & internet → SIMs → select Roamix → enable Data Roaming → set as preferred data SIM. Toggle Airplane Mode on/off.
QR code scan fails: Must be on Wi-Fi. Try entering the SM-DP+ address manually (tap "Enter activation code" if available in your Android version).
Sony Xperia 1 Series eSIM — Frequently Asked Questions
Does the Sony Xperia 1 VI have eSIM?
Yes. The Xperia 1 VI (international variant) supports eSIM alongside a physical SIM. Xperia 1 VI units purchased in Japan with carrier firmware (docomo/au/SoftBank) may show the eSIM menu but reject third-party eSIM profiles.
Why is my Japanese Xperia 1 rejecting Roamix eSIM?
Japanese carrier firmware (docomo, au, SoftBank) on Xperia devices may restrict eSIM to Japanese carriers only even after SIM unlock. You need the international (non-carrier) firmware — contact Sony Japan support or check XDA for firmware flashing options.
How do I activate eSIM on Sony Xperia 1?
Settings → Network & internet → SIMs → + icon → Download a SIM instead. Scan the Roamix QR code. Set the Roamix eSIM as the preferred data SIM and enable Data Roaming.
Does the Xperia 1 IV support eSIM?
Yes. The Xperia 1 IV (2022) was the first Xperia 1 flagship with eSIM support. International/unlocked variant supports third-party eSIMs. Japanese carrier variants have known restrictions with non-Japanese eSIM providers.
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