Are sim card slot problems related to motherboard of a mobile?

[AC Question]

I have a Samsung Galaxy Core mobile 14 months old and was functioning fine till I changed my simcard a few days back. The phone has dual sim ports. The number 1 sim port stopped recognising the sim card and started to show emergency services only. The sim card works fine in other mobiles. I took the mobile to the service center and they tell me that the motherboard needs to be replaced.

 

[Rukbat]

It's certainly possible. The port itself could be bad, the motherboard could be bad. If the port is mounted on the motherboard, most shops won't try replacing just the port - they could easily damage the motherboard, then they'd have to pay for a new one.