No service on unlocked 02 phone using O2 sim

[Boaybuoy]

I bought a unlocked IPhone6s previously on O2. Put a O2 payg sim and still no service after 24hrs. I checked before buying independently it was unlocked and the seller states it was unlocked. 

Surely if if it was O2 before the unlock shouldn’t matter ? How do I approach this ?

[adamtemp64]

What are the error messages if any ? Where did you buy it ?

Edit

http://www.imeipro.info Check the imei there 

[MI5]

@Boaybuoy

If it is showing "No Service" it means the phone is accepting the sim and is, therefore, unlocked.

There is something else wrong with either the phone or sim card.

[jonsie]

Ebay by any chance.....?

[adamtemp64]

@jonsie you spoil sport was hoping @Boaybuoy would update us 

[jonsie]

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@adamtemp64 wrote:

@jonsie you spoil sport was hoping @Boaybuoy would update us 

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A complete random guess......

[Bambino]

@Boaybuoy Do you have credit on the sim?