How to transfer contact and calendar info from other device to Galaxy S3 or S4.
I will be talking on 2 methods that can help you archive this, and this methods are Using a Bluetooth
and Using MicroSD card
1. Using Bluetooth
: To do this, you have to find the Bluetooth connectivity option. Where the setting is will vary depending. There should be some sort of menu or settings option that will list Bluetooth. Now, make sure Bluetooth is on and make the device Discoverable. Now to go your Galaxy S3 or S4 and go to Menu (button) > Settings > Wireless & networks > Bluetooth settings. Check on Bluetooth and then "Scan for devices". You may have to put your old phone back into discover mode, because discover mode times out for security and battery purposes. Your two devices should appear and you have to follow the prompts to pair them. This may include entering in a code. Now you can select your Galaxy S3 or S4 on your old phone and send files, contacts, and Calendar info.
2. Using MicroSD card
: This is the second option you can use to transfer contacts, and this is via microSD card. Most phones have a microSD card. You can export your contacts to the SD card. Now, turn off both devices. Take the SD card out of your Galaxy S3 or S4 and put it to the side. The SD card is in the battery compartment and you have to remove the battery before you can remove the SD card. Put the SD card from your old phone in the SD card slot and boot the phone. Now you need a file browser to view files on your SD card. I recommend ES File Explorer. Find your contacts (probably at the bottom of the list) and open them. The phone will save your contacts. Now, turn off your phone and swap the SD cards back and reboot your phone. I recommend you sync your phone with Backup Assistant.