Mobile phone networks?

[has]

Hi kids,

I've purchased a mobile on the Orange network. My original phone is on the same. Am I able to just transfer my sim card in to my new phone? As I must keep my old number.
However, what does an Unlocked phone mean.

Thanking you in advance chaps...

[Stephen_G]

Yep, you can put your old card in your new phone and keep your old number (my dad has just had to do the same).

An unlocked phone will take any sim from any network.

[has]

thanks judge...

[Panic Button]

Even if the phone was locked to the network, you would be OK as both are on Orange.