C510 Invalid SIM error

[#1]

I have been using C510 for a couple of years now.

My phone has started giving 'Invalid SIM error' off late quite often.

I have tried reinstalling the software on my phone but the error has not gone away.

I have also used the SIM in other phones,  where it works fine which means there is nothing wrong with the SIM.

Even using other SIMs which work in other phones, gives me the same error.

What do I need to do?

[Dr_Chris]

I suggest you try cleaning the SIM contacts inside the phone and failing that, try a master reset. Otherwise, it's probably a hardware issue and you will need to send it in for repair.Hope this helps.