Will a 3 sim work in my Motorola W377?

[ConorW]

I think my mobile's 2G but 3 mobile is a a 3G network. Could I use 3?

[geeth]

HI yes your 3 network sim will work in Motorola W377 mobile only if it is unlocked one or already locked with 3 .Else if the phone is locked to some other network provider then you can't freely use it with any GSM sim until you unlock it .You can easily unlock your phone using sites like Unlocking4U.com they are providing unlock code for all mobile models at reliable cost .