$540 via promo credit when you add a new smartphone line with your own 4G/5G smartphone on postpaid Unlimited Plus plan between 5/18/23 - 5/31/23 & port-in req'd. Promo credit applied over 36 months; promo credits end if eligibility requirements are no longer met.
You will need a barrel connector and another piece of cable. You want the cable to be RG6, that is the gauge of the wire. The barrel connector will be put between both pieces of cable to make it one length.