locked phone

[Anonymous]

l got my Nokia 520 from car phone warehouse a few years ago unlocked , had o2 pay&go after 12mths changed to giff gaff then ee and back to o2 but now found a new network put sim in phone only to find my unlocked phone is locked to o2 been local o2 shop can't help it's car phone warehouse so saw them they said o2 as it's them who's locked it 😢 any help please thank you in advance.

[MI5]

CPW sell unlocked phones so except for iPhones they should be open to all networks.
Whose network sim did you try and what message appeared when using that sim?

[chrisymon]

You say its locked to o2 hardly likely unlocked phones cannot be locked to a network after purchase especially when brought unlocked.. Have you tried putting EE gifgaffe back in to see if they still work? 

The other sim you have now may  just be  not compatable with your phone. Out off interest what network is it? 

[adamtemp64]

@chrisymon as stated in @MI5 response only iphones from cpw lock to first carrier sim so it is possiable

[PhoneChanger]

If you have been able to use EE before along with O2 this would suggest your phone is unlocked.

If however it has somehow become network locked O2 will be able to do it for you, but since it is a Pay as you Go account you will need to pay for the unlock with credit. You can request the unlock online (stores cannot do this for you as far as I know)

[MI5]

I guarantee this phone is not locked.

[Anonymous]

Thank you for your answer, i have retryed giff gaff and ee sims still no joy ( this phone is locked to network provider emergency calls ) but you say can't be locked so what does this message? does it mean whatever ever sim I'm Trying to use or what it says LOCKED even the shop assistants at both o2 & cfw don't understand it ( took phone to store works on o2 ) as phone has been used on other networks , or am i trying to scam o2 to get free unlock there again i could be just stupid and put sim in upside down sorry .

[MI5 · Accepted solution]

A giffgaff sim will work even if phone is locked to o2 so the phone must be faulty.