Have have just bought a second hand refurbished s4 because i smashed my s6 and my contract still as 6 months to run when i try to set it up and get on to the welcome screen when i press the next button to go on to the next page just a green box comes aroiund the next word and nothing happens anyone any ideas. thanks
Try a factory reset would be my guess if not contact the seller.
turn off the phone. Press and hold at the same time Volume UP,Home and Power keys. When you see Galaxy logo release the Power key but continue to hold the Volume Up key and the Home key.
Release them when the Android System Recovery screen appears. Use Volume Up/Down keys for navigation and Power On key for OK. Choose "wipe cache partition", "Yes -- delete all user data", "reboot system now".