Need some help with my LG KF750

[ryler1974]

Hi i have a lg kf750 got from a friend worked ok for week wiv 02 sim now it says unregistered sim is there any reson for this ? is there anything i can do as it worked for about a week now nothing any help you be great. thanks

[Lilsproles]

no idea really, but I have a problem like yours, although I know why, it's because they are different companies/SIMs and they don't like each other..maybe your service doesn't work with that?