I know this is an old machine however after purchasing a second-hand unit and flying it I found that there were issues with it. My phone had issues trying to connect to the RC WiFi, the image stuttered no matter how far away and the video signal started dropping out after 250m. Solution, downgraded the firmware to 1.08.10 and problems went away. I also did the Magic Power upgrade to get a better range of 700m+
For anyone else like me who purchases a second-hand unit and find the same issue, try a firmware downgrade.

Hi there. Thank you for reaching out and we're sorry that you experience issues on your unit. We're glad that you already manage to isolate the said issue that you experience and we thank you for sharing the troubleshooting steps that you did. Thank you for your continued support!

Thanks for the tips man I just bought mine and it won’t connect to the WiFi, it’s asking for a SSID number and I can’t find anyone that does know what that is.