My iPhone 5 was factory unlock but I restored it?

I have an iPhone 5 that was factory unlocked but I restored it and now I can't connect to other carriers but I went to imei checker to see if it was unlocked and it says it is but I don't know

"factory unlocked" means it comes directly from the factory unlocked. If you purchased the phone from Apple factory unlocked, then you were scammed.

A genuinely factory unlocked iPhone can't be locked again, particularly through a restore.

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