Latest Facebook 31 user agents:

User Agent	Platform	Device
Mozilla/5.0 (iPhone; CPU iPhone OS 8_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Mobile/12F70 [FBAN/FBIOS;FBAV/31.0.0.44.261;FBBV/10598108;FBDV/iPhone5,4;FBMD/iPhone;FBSN/iPhone OS;FBSV/8.3;FBSS/2; FBCR/BouyguesTelecom;FBID/phone;FBLC/fr	iOS 8	iPhone 5C
Mozilla/5.0 (iPhone; CPU iPhone OS 7_1_2 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Mobile/11D257 [FBAN/FBIOS;FBAV/31.0.0.44.261;FBBV/10598108;FBDV/iPhone3,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/7.1.2;FBSS/2; FBCR/TelfortNL;FBID/phone;FBLC/nl	iOS 7	iPhone 4
Mozilla/5.0 (iPhone; CPU iPhone OS 7_1_2 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Mobile/11D257 [FBAN/FBIOS;FBAV/31.0.0.44.261;FBBV/10598108;FBDV/iPhone3,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/7.1.2;FBSS/2; FBCR/SFR;FBID/phone;FBLC/fr_FR;FB	iOS 7	iPhone 4
Mozilla/5.0 (iPhone; CPU iPhone OS 7_0_4 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Mobile/11B554a [FBAN/FBIOS;FBAV/31.0.0.44.261;FBBV/10598108;FBDV/iPhone3,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/7.0.4;FBSS/2; FBCR/Carrier;FBID/phone;FBLC/en_	iOS 7	iPhone 4
Mozilla/5.0 (iPhone; CPU iPhone OS 7_0_2 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Mobile/11A501 [FBAN/FBIOS;FBAV/31.0.0.44.261;FBBV/10598108;FBDV/iPhone3,2;FBMD/iPhone;FBSN/iPhone OS;FBSV/7.0.2;FBSS/2; FBCR/SFR;FBID/phone;FBLC/fr_FR;FB	iOS 7	iPhone 4