Tesco mobile

[AndyH]

As tesco use the 3 network can my daughter who won a tesco mobile in a competition at her club use a 3 sim in it or does it require umlocking

[Three_Deborah]

@AndyH What a fabulous prize for your daughter. She must be over the moon! While Tesco Mobile uses a designated part of our mast network system, it isn't part of Three the company, if that makes sense. So the first thing I'd do is check if the phone is unlocked already but popping in a Three SIM. ( Some smart phones are unlocked) If it isn't unlocked, you might have to talk with Tesco Mobile.

[billbond4]

Generally phones would be locked to a specific network, but the best way to confirm is to use a sim from another network like @Three_Deborah said