Thanks Cris, I thought it might be something like this,no way of getting it going?If the sim holder is blocked then the original owner didn't spec the phone option. I can't remember if it's hardware or just software that's missing.
If you don't have the symbol for the phone signal strength on the bottom left hand side of the sat nav screen you do not have the system installed...can be retro fitted but the hardwear is v.expensive.
No sat dish is for Navigation only....you need the four bars which step up showing signal strength.