Error when importing contacts (checker, broadcast)

It's better to use Android 5. On Android 7 a contact import error can occur.

On Android 7 (and on Android 5 in some emulators) the Contacts app must be granted read/write contacts permissions: the permission is requested on the first attempt to add or import contacts (granted once).

After running the Checker, open the file manager (in the emulator) and find the file sdcard/to_imort_contacs.vcf. Tap it and pick the Contacts app to open it. Grant everything and import. You need to do this once — after that, checks will run without problems.

The emulator must have a "Contacts" app: without it you can't import contacts and check them on WhatsApp. Nox has this app out of the box; MEmu needs it installed. More: How to install the Contacts app in the Nox / MEmu emulator