Phone locked after reset

[Erethicus]

Hi Guys hope you can help. 
I have a iphone 5s network unlocked from EE about 5 yrs ago, ive had various sims in over the yrs but this weekend I reset the phone. It will now not accept my network sim card of which has been using for about three yrs. can you advise what to do please. 
many thanks. 

[bristolian]

Hi @Erethicus 

Welcome to the EE community

What happens when you try to use an alternative SIM in the phone? Can you explain what you mean by "it will now not accept"?

[Erethicus]

Hi thanks for replying. 
when I put in a sim that is not ee it says sim not supported.

I have had 02 sim and Asda sim in over the yrs but since I reset the phone it says sim not supported. When I go in setting on the network it says ee. Has I said over 5 yrs ago I had the phone unlocked to any network.
thanks  

[Christopher_G]

Hi @Erethicus

Welcome to the community.

That's really strange. I've sent you a private message to get some information from you.

Could you take a look and get back to me please?

Thanks

Chris