Network unlocked handset necessary?

I am buying a refurbished Galaxy as my current isn’t on the phones list. Do I need to get it as unlocked/my network, or does it not matter because I will be installing a whole new OS?

If you want install any new custom rom on a device it must ‘unlocked’.

Thank you I appreciate this, will make sure I get an unlocked handset then

why don’t buy a ePhone ??

Bc a) they cost 5x as much and b) I like a challenge

OK, good luck to get a cheaper one