There are lots of ways to get 360 degree panoramic images. you can find them on google+ you can find them on google image searches. you can find them on websites like sphereshare.net, Some of of my favorites were of a panorama stitched from one of the moon landings, and a selfie done by the mars rover (with an edited in amazing sky.... Some of them are as easy as right clicking and downloading, some are trickier, (not the time or place to go into stealing images if you can't find it out in the open to download, consider finding/writing the creator to ask for a copy.)

You are welcome to snag some I've collected, only about 1/3 are my own photos, so if you own the rights to any of them and want me to take them down, just let me know. http://pages.swcp.com/~adric/pano/

Then once you have the panoramas, you need to get them to your phone, you can transfer them to a folder via usb, you can email them to yourself and save them on the phone, you can find them via apps like sphereshare app, and download them (may require paid version)