Help with hotspot/tetherme

[georgebrown88]

Hi all, I've just tried to use tether me and personal hot spot on my jail broken iPhone 5 running iOS 6.1..2 and I've tried to connect my mates mobile phone to it and the screen of my phone is flickering like mad. Anyone out there no why and how I can fix this please. I've since deleted tether me and just tried personal hotspot and still same. Thank you