What happens if I do not use all of my data. Will the unused data be rollover? April 29, 2024 05:43 Updated Yes, the unused data will rollover only for 1 month.Please see the examples below. Related articles What is data allowance ? Will the unused data be rolled over? When will new data be allocated? I am using a Pocket WiFi and I need to have more data this month. What do I do? What will happen after I use all of my SIM's high-speed data? (Long-term SIM card)