What's an affordable way to keep a couple phone numbers?

narfcake thought this was worth mentioning said
2

As I'm helping to wind the office down (not a fun task, BTW), we have a couple phone numbers we need to retain and forward. I thought about a couple MagicJacks and porting the numbers over, but apparently, they suck. Porting over to cell phones is an option; if the widow has to change from Verizon to T-Mobile or AT&T based network, that's fine, but if there's another solution that'd average

Sooo ... any ideas?