I'm thinking per line, that way it's easy for everyone to compare. If it was the total of all lines on your plan, it would vary greatly depending if you had 2 lines or 10.Would this be per line or per plan (given that quite a few are on shared data plans with a few lines where each line can use different amounts)?
On a 10 GB/month plan with 4 lines we generally use up at least 6 GB and up to close to 10 GB sometimes. Mostly it's a couple of lines that split much of the usage, while the other two don't have that much between them. On the couple that split the usage it's roughly 2 to 4 GB per month on average.I'm thinking per line, that way it's easy for everyone to compare. If it was the total of all lines on your plan, it would vary greatly depending if you had 2 lines or 10.