I have contacted O2 via chat and they mentioned same that i need to use
pay as you go sim and then put request to unlock this phone. very
helpful service. thank you everyone for your input in this matter.
When i enter Three network sim card to samsung galaxy 8 mobile which was
on 02 network i see message "sim network pin blocked. enter sim network
puk" i have contacted three who mentioned my mobile is locked by 02
network.
