Go to Settings > System > About Device . Look for the "Processor" line (it should say UIS7862 or similar) and the current "Build number."
Always ensure you are sourcing your files from a reputable vendor or a trusted community forum like XDA Developers to ensure the build is clean and compatible.
If the device gets stuck on the logo, you may need to perform a "forced flash" by holding the reset pin while powering on. The Bottom Line