Introduction #

Telephony Manager is an API how system applications can acces SE (Secure Elements) including SIM cards and eUICCs. As it is system application specific, it can not be accessed from a random third-party APK application on a standard (non-rooted) device. Therefore, the Telephony Manager AP is mostly relevant for people performing custom builds of Android.

This feature is available in Android 9 (API level 28) or later.

Checkpoints #

• PackageManager#FEATURE_TELEPHONY_SUBSCRIPTION
• PackageManager#FEATURE_TELEPHONY_EUICC
• PackageManager#FEATURE_TELEPHONY_EUICC_MEP
• getSystemService(Context.EUICC_SERVICE)
• EuiccManager#isEnabled()
• esim.enable_esim_system_ui_by_default (source code)
• ro.telephony.sim_slots.count (source code)
• ro.setupwizard.esim_cid_ignore (source code)

Privileged Permissions #

• Privileged Permission Allowlist

FOSS Applications #

• OpenEUICC, does not provide an official precompiled installation package.
• magisk-module-openeuicc, Unofficial Magisk Module for OpenEUICC.
• ISD-R Access Provider
• eUICC Probe

References #

• Implementing eSIM
• android.telephony.euicc (source code)
• com.android.internal.telephony.euicc (source code)
  • EuiccConnector#isValidEuiccComponent
• 2018-10-21 Android 系统对 eSIM 的支持 (Chinese)
• 2020-06-14 Google Pixel 4 がデュアル SIM 端末になるとき (Japanese)
• 2021-01-28 eSIM が無ければ Pixel 4 を潰せばいいじゃない (Japanese)
• 2022-12-28 eSIM RSP Android App Privilege Elevation for WRITE_EMBEDDED_SUBSCRIPTIONS
• 2023-07-05 较低价格的 eSIM.me 平替 (Chinese)
• 2023-10-09 Pixel 7 のログから逆引きして学び始める eSIM MEP (Japanese)
• 2023-11-24 Android eSIM - LPA 基于 Android13 的实现 (Chinese)
• 2024-02-04 给想入坑的朋友再次提个醒， OpenEUICC 并不是所有手机都可以用 (Chinese)