ContributionsMost RecentMost LikesSolutionsData add on - what gets used first I have 4gb data per month. If I bought a 10gb add on (£9) which carries on until it runs out which would get used first the 4gb monthly allowance or the 10gb add on. I was thinking of putting on 10 GB just in case the 4gb runs out but if the 10gb gets used first it's doesn't make sense.
