Facebook Lite - MyPhone MyA2
From the Google play store
"Keeping up with friends is faster and easier than ever with the Facebook Lite app! Use Facebook Lite as a friends app to connect and keep up with your social network. The Facebook Lite app is small, allowing you to save space on your phone and use Facebook in 2G conditions. Many of the classic features of Facebook are available on the app, such as sharing to a Timeline, liking photos, searching for people, and editing your profile and groups."