As a PFB contributor, you have access to our monthly background download. You should have received a link to the photos on Dropbox via email.
Here is how you download on desktop. Click the link in your email and then click “download” on Dropbox.
On your phone, you can click the link in your email and click on the phone thumbnail. Once you are in the phone photo, hold it down and you should get a “save image” option. Voila, phone backgrounds.