I am about to change mobile providers and have got a new sim card for my Nokia 3330 (it may be a 3310 I'm not sure). I assume that I will lose all the phone numbers I have so am looking for something cheap and cheerful to download stuff onto a PC and then be able to upload it to the new sim card. What sort of cable would I need to do this and what software ? Do I also lose my custom ring tones ? Or are they stored in the phone ?