My HTC Wildfire does not have an SD card. I am changing phones and providers, from HTC Wildfire on 3 Network to an HTC One on Vodafone. Please advise how I can transfer my contacts from my 3 Network sim card?
I will recommend you this HTC's official app.
Some of the 3 methods,
Go to Accounts and Synch and then synch your contacts with your google account.
You could export all contacts in the .VCF format.
You could take a backup using a third party software such as Super Backup