Dial the code *#*#4636#*#* (which spells *#*#INFO#*#*), select “Phone information,” and then the desired network type.
There was an issue identified with the 1.7.0-iode.14 version, so the 1.6.2-iode.15 was introduced to revert that. I understand that a new OpenEUICC version, 1.7.1 resolves the original issue with 1.7.0 and will be included in iodéOS 7.8 releasing in the very near future.
I hadn’t heard of people unable to open the reverted 1.6.2-iode.15 though, I hope the new update will fix that but let us know if you still can’t open it after 7.8 comes out.
Sure, will do when the new update arrives 
Hey, so I tried the 7.8 today with OpenEUICC 1.7.1-iode17 and the good thing is that it works!
The bad news is that I still cannot open the app since the time that I uninstalled it and downgraded it. I got some android logs while opening the app in case they are useful:
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09-02 22:36:13.391 2585 2585 D BaseActivity: Launcher flags updated: [state_started] -[state_window_focused] 09-02 22:36:13.392 9572 9572 D nativeloader: Configuring clns-9 for other apk /data/app/~~vLnUuCdHGp2Zz8-jAP6TSA==/im.angry.openeuicc-E5uXAhRY3aI3uzldRY3j9Q==/base.apk. target_sdk_version=37, uses_libraries=, library_path=/data/app/~~vLnUuCdHGp2Zz8-jAP6TSA==/im.angry.openeuicc-E5uXAhRY3aI3uzldRY3j9Q==/lib/arm64:/data/app/~~vLnUuCdHGp2Zz8-jAP6TSA==/im.angry.openeuicc-E5uXAhRY3aI3uzldRY3j9Q==/base.apk!/lib/arm64-v8a, permitted_path=/data:/mnt/expand:/data/user/0/im.angry.openeuicc 09-02 22:36:13.396 9572 9572 V GraphicsEnvironment: Currently set values for: 09-02 22:36:13.396 9572 9572 V GraphicsEnvironment: angle_gl_driver_selection_pkgs=[com.android.angle, com.google.android.apps.tachyon] 09-02 22:36:13.396 9572 9572 V GraphicsEnvironment: angle_gl_driver_selection_values=[angle, native] 09-02 22:36:13.396 9572 9572 V GraphicsEnvironment: im.angry.openeuicc is not listed in per-application setting 09-02 22:36:13.396 9572 9572 V GraphicsEnvironment: ANGLE allowlist from config: 09-02 22:36:13.396 9572 9572 V GraphicsEnvironment: No special selections for ANGLE, returning default driver choice 09-02 22:36:13.396 9572 9572 V GraphicsEnvironment: Neither updatable production driver nor prerelease driver is supported. 09-02 22:36:13.404 9572 9572 D AndroidRuntime: Shutting down VM 09-02 22:36:13.405 9572 9572 E AndroidRuntime: FATAL EXCEPTION: main 09-02 22:36:13.405 9572 9572 E AndroidRuntime: Process: im.angry.openeuicc, PID: 9572 09-02 22:36:13.405 9572 9572 E AndroidRuntime: java.lang.RuntimeException: Unable to create application im.angry.openeuicc.PrivilegedOpenEuiccApplication 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.app.ActivityThread.handleBindApplication(ActivityThread.java:8144) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.app.ActivityThread.-$$Nest$mhandleBindApplication(Unknown Source:0) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2690) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:132) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.os.Looper.dispatchMessage(Looper.java:333) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.os.Looper.loopOnce(Looper.java:263) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.os.Looper.loop(Looper.java:367) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:9287) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:566) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:929) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: Caused by: java.lang.SecurityException: Caller does not have permission. 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.os.Parcel.createExceptionOrNull(Parcel.java:3373) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.os.Parcel.createException(Parcel.java:3357) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:3340) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.os.Parcel.readException(Parcel.java:3282) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at com.android.internal.telephony.ITelephony$Stub$Proxy.getUiccCardsInfo(ITelephony.java:12715) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.telephony.TelephonyManager.getUiccCardsInfo(TelephonyManager.java:4317) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at im.angry.openeuicc.util.PrivilegedTelephonyCompatKt.getUiccCardsInfoCompat(PrivilegedTelephonyCompat.kt:89) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at im.angry.openeuicc.core.PrivilegedEuiccChannelManager.closeAllStaleChannels(PrivilegedEuiccChannelManager.kt:16) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at im.angry.openeuicc.PrivilegedOpenEuiccApplication.onCreate(PrivilegedOpenEuiccApplication.kt:15) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1400) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: at android.app.ActivityThread.handleBindApplication(ActivityThread.java:8139) 09-02 22:36:13.405 9572 9572 E AndroidRuntime: … 10 more
Please try to reinstall the “Preinstalled Apps” version and restart and report back.
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That worked actually! I just uninstalled the app from the iode store and install it through the “Preinstall Apps” menu and it works 
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