UK, Sim Free, PAYG, T-Mobile, not rooted. I have had the S3 for just under twelve months and am considering obtaining the S4. The S3 will leave my possession before I obtain the S4. I wish to transfer my text messages from the S3 to the S4, where are these located on the S3? I wish to copy all of my contacts from the S3 to the S4. These are currently held on the phone as opposed to the sim card. What is the best way to accomplish the above as well as ensuring that none of my personal data is left on the S3?