Home Slickdeals AT&T: Trade In Eligible Phone + Upgrade/New Line: Samsung Galaxy S21 5G... Slickdeals AT&T: Trade In Eligible Phone + Upgrade/New Line: Samsung Galaxy S21 5G Phone $800 Off via 30-Month Credits By ARCOM - 5 February 2021 63 0 SHARE Facebook Twitter Go to the deal page: AT&T: Trade In Eligible Phone + Upgrade/New Line: Samsung Galaxy S21 5G Phone $800 Off via 30-Month Credits