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 the minimum age to sign up a plan with Grid Mobile? What is my billing cycle? What are the documents Grid Mobile accept upon signing up? Comments 0 comments Please sign in to leave a comment.