How many lines can I sign up under my ID? Admin May 04, 2020 01:50 Updated Follow You are able to sign up maximum 8 lines with your ID. Quick tip! You can sign up for more lines by making use of the “Buy more lines” feature in gridPortal! Related articles Are there charges that I have to take note of when I register for a new account? When can I terminate my line? What is my billing cycle? Are we allowed to terminate the Free SIM/Buddy SIM without terminating the main line? What is the minimum age to sign up a plan with Grid Mobile? Comments 0 comments Please sign in to leave a comment.