AI summary
Override a SIM's carrier and country ISO without root, using Shizuku. Open-source tool for developers to simulate different carrier environments. Optionally mirrors the masked region to selected apps' per-app locale.
Generated by AI. May contain inaccuracies.
Screenshots
About this app
A no-root Android tool for overriding a SIM's home country (region) and carrier name — and optionally mirroring that region onto selected apps' per-app locale — so developers can simulate different country/carrier environments on their own device for debugging. Roamer changes the CarrierConfig override layer that the system exposes through the telephony APIs, letting you make an app read your SIM as if it belonged to another country or carrier. It borrows shell privileges through Shizuku instead of requiring root.
Typical use: verify how your own app behaves for users in the US / Japan / Hong Kong / Korea, or with a specific carrier, without swapping physical SIMs.
It also offers an optional per-app region override: pick a set of apps and their per-app locale follows the primary SIM's masked region (e.g. mask the SIM to Japan and the selected apps read/display as ja-JP). It is off by default and reverts each app to its original locale when the SIM is restored.
What's new
Override a SIM's country ISO and carrier name with no root, through Shizuku. Dual-SIM: override or restore all slots in a single operation. One-tap mask to US / JP / KR / CN / HK, using each region's leading carrier; the active button stays highlighted. One-tap restore, per SIM or all at once; values are re-derived at runtime, so no snapshot is stored. Optional per-app region override: selected apps follow the primary SIM's masked region via their per-app locale, and revert automatically when the SIM is restored (off by default). Original and current values shown side by side; technical codes (MCC/MNC/ISO/subId) in a monospace style. Overridden tiles marked with a tilted, semi-transparent mask stamp. Light / dark theme, switchable independently of the system; Material 3, WCAG AA contrast. English and Chinese, following the system language, with per-app override on Android 13+. Branded splash screen; colorblind-friendly log (icon plus text).
About this version
- Version
- 1.0.0 (1)
- Size
- 21.53 MB
- Requires Android
- 12
- Target SDK
- 31
- Architecture
- arm64-v8a, armeabi-v7a, x86, x86_64
- Downloads
- 105
- Updated
- Jul 6, 2026
- Package
- com.eigenlux.roamer
Ratings & reviews
- 50
- 40
- 30
- 20
- 10