From your prepaid number
Step 1. Top up on your personal number.
Step 2. Dial *100#.
Step 3. Choose option 1 <MiFi Plans>.
Step 4. Add your MiFi number.
Step 5. Choose one of the available plans.
Step 6. Confirm.
Step 7. The plan will activate in a few minutes.
***Note: Your personal number and your MiFi number will get a message that the plan is activated.