I changed my sim card and contact names are gone in messages app.

When I changed my sim card to a Spanish one in messages app's contact names are gone. My contacts are in iphone not in sim card i can see them in contacts but the problem is number are showing in messages not the names.

The SIM is not involved. The iPhone does not save contacts to the SIM. Most likely when you restored the phone as a step in unlocking the phone you did not restore your most recent backup.

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