For non-rooted stock 4.4.2, the only viable path is the Play Store itself – but if Play Services is missing or broken, the Store won’t open, creating a deadlock.

Modern Google Play Services apps (the components that allow the Play Store to run) have been updated to require or higher. They utilize newer programming protocols (like TLS 1.2/1.3 requirements for security) that Android 4.4.2 does not natively support without patches.

Assuming a clean custom ROM without GApps, the installation involves flashing a ZIP package through a custom recovery (TWRP) or manually installing split APKs – but success is fragile.

Some devices lack the account framework:

Play Services not fully registered.