I'm not sure if you'll be able to use the phone you have. However, you can buy a cheap burner phone and the card to load the minutes onto the phone at Walmart.
Originally Posted by Seline
+1
You can buy a phone at gas stations, family dollar, dollar general etc. Pay cash & pick a long term service card & plenty of data so you don't have to keep refilling it.
You may need to provide personal information when activating it (either by calling or online). Create an identity and have the info handy for reference, they don't verify just need info for their records.