When i turn on tom tom it shows insert memory card then it shows red cross

your tom tom need a sim card what go on the side of it that y you got the red cross through it please go back to the shop where you got it and ask for you tom tom sim card then it will work 100%

The memory card you have inserted is damaged and needs to be replaced

This problem is due to the memory card not containing the TomTom application or map. To update the application onto the memory card, Connect the device to your computer. Open the TomTom Home application. Click on 'Update My Device'. This should then install the application onto the SD card. Alternativly, you could perform all the steps above without the SD card in the device, this will install the application onto the internal memory. Note: you may also need to install your maps, voices, etc after you updat.

This problem is due to the memory card not containing the TomTom application or map. To update the application onto the memory card, Connect the device to your computer. Open the TomTom Home application. Click on 'Update My Device'. This should then install the application onto the SD card. Alternativly, you could perform all the steps above without the SD card in the device, this will install the application onto the internal memory. Note: you may also need to install your maps, voices, etc after you update.

I saved the map on to my computer from the tom tom in Tom Tom Home and installed it on to a new SD card and now it working perfectly. I bought a 2mb SD card for £6.70 put it into a card reader and connected to computer and installed map and it gave me the instructions to put into device (Tom Tom) and switch on to connect then off and back into card reader to finish. Then I disconnected device which is important to do by the way put the new Sd card into Tom Tom and it is workink perfectly. I hope this help others who have problems.

Red cross issue:
http://www.tomtom.com/support/index.php?Language=1&query=red+cross&FID=1898

Device not recognised by PC:
http://www.tomtom.com/support/index.php?Language=1&query=connect+to+home&FID=7375

Device not recognised by TomTom Home:
http://www.tomtom.com/support/index.php?Language=1&query=connect+to+home&FID=7375

http://www.tomtom.com/support/index.php?Language=1&query=red+cross&FID=1898

Is this a new unit? How long have you had it?

I had one for 6 months and had to return it to the store because it stopped locking onto satellites. It sounds like the hardware fault. Did you try the reset button? It returns it to its default factory settings.

Regards,

Spare head 2.

Find solution here:
http://www.tomtom.com/support/index.php?Language=1&query=red+cross&FID=1898

This would suggest the card may be faulty. If you have a backup of the info on the card, try formatting the card and restoring the data.