registering Cellular phones

I would at least like to transfer my contacts if possible to another cellular chip before I lose the number. Being the neanderthal that I am, I am looking for ideas on how I might be able to transfer my contacts?

If you are unable to rectify the underlying issue put your contacts on Google and they will follow you. If it's a dumb phone ask Telcel if there is a way otherwise write them all down and re-enter.