can i manually change network ?

[hicky4321]

any help much appreciated folks. I just bought an iphone 4 off my friend as he upgraded to iphone 5 can i manually change my network using the handset,he was on vodafone i am on 02 been told i can change it on settings but dont know my way round these phones

 

[tornado]

if the phone is locked to one network then no so u nee to get it unlocked or do it your self

 

[stigie]

ask your mate to talk to vodafone to unlock it,i just done one on o2 they charged me £15 :-)

 

[hicky4321]

going to get my friend to phone voda let them do it. nice 1 guys.