Why is my Samsung Galaxy Z Flip 5 needing to be unlocked? To use the other domestic and international networks on your Samsung Galaxy Z Flip 5, you must first unlock your phone by entering an easy-to-enter unlock code as if you were making a call. You can unlock your Samsung Galaxy Z Flip 5 on your own by following the instructions listed below. Unlocking the Samsung Galaxy Z Flip 5: A Guide. You would be surprised at how easy it is to unlock the Samsung Galaxy Z Flip 5 via unlock code. No special knowledge or equipment is needed. Please take the following steps: That is all, enjoy your Samsung Galaxy Z Flip 5 on all networks across the world, SIM-free or unlocked. Notes: