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I would like to install Locus Free or Pro from the Google Play, but it either cannot be installed at all or the installation is not successfully finished.
There may be several reasons for this. In the first place, it is important what you see on the app page at Google Play Store before the installation. If Device is not compatible or Install:
Locus is compatible with almost all devices running Android operation system beginning with 4.0.3. If you still can not install due to incompatibility, please contact us via email email@example.com and inform us about the type of your device.
If you tap (click) on the Install button, yet the installation does not start, the Google Play will probably notify you about the error number. In this case, it is a temporary error on the Google Play and the following procedure may help:
It may happen that after tapping Install, the installation begins but in a short while it stops with error number again. This is probably an error on the Google Play. In this case, follow the same procedure mentioned above.
This error occurs usually in some Xiaomi devices, e.g. Redmi 1S. Sometimes the installation does not execute without any reason or error message, sometimes the built-in Xiaomi antivirus app flags Locus as infected and the installation is aborted. Of course Locus Map contains no viruses
Xiaomi suggests following procedure (works only in 90% cases):
Method for rooted devices:
According to our users' experience a few other ways work as well:
This error is concerning Xiaomi again but this has nothing to do with Play Store. Error -26 is related to MIUI's package manager and translates to INSTALL_FAILED_SYSTEM_INCOMPATIBLE. So, it is MIUI who is preventing the install. Somehow MIUI thinks that the apk is incompatible.