Can I add / Top Up Data in the middle of a month if I used all the Data allowance? Kana/Hiromi December 17, 2018 06:35 Updated Follow Yes, you can top up from Top Up pagePlease note that Top Up data will expire at the end of the purchased month. Related articles What happens if I do not use all of my data allowance. Will the unused data allowance be carryovered? When data allowance will be added? How do I check my data usage? What is a Data allowance ? Can I use tethering / Hotspot / Internet Sharing ? Comments 0 comments Please sign in to leave a comment.