Belong $25 Starter Pack for $10 @ Woolworths

Starter Pack Features

• 10GB Data (+10GB on the 1st billing date)
• Unlimited national calls & sms.
• Unlimited data banking.
• Unlimited data gifting.
• No lock-in contracts.
• Flexibility to change plans once every monthly payment cycle.
• Data slows to 64 kbps if you use all your monthly allowance.
• Telstra 4G & 3G.
• 12 month starter pack expiry (you have 12 months from the purchase date to activate)

Here is a good option for getting the most out of this starter pack. Before you activate make sure you get a referral code from a friend already with Belong or the OzBargain Belong pool for an additional $20 credit.

3 Months 22GB - Activate on the $25 10GB per month plan. When the first payment date comes you'll already have 10GB data plus you get another 10GB (Double Data). After the first payment date switch to the $10 1GB per month plan for the 2nd & remaining months. The first 3 months cost is covered ($25 starter pack credit plus $20 referral credit) and data rolls over every month or can be gifted.

Billing Dates (4th, 12th, 20th & 28th)
Plans are billed on the same date monthly. The time between activation and the next billing date is free.
One month worth of data is credited on activation, and another on your first payment date, 1-8 days later. So you effectively get double data for the first monthly payment at no extra cost. You can then change to a lower rate plan ($10/month) and use the banked data allowance.

More info at the Belong Wiki
Customer Terms

You can cancel your service by notifying us. We’ll cancel your service within 24 hours. It may take up to 24 hours to process your request, so you’ll need to let us know at least 24 hours before the start of the next monthly bill cycle.

Credit to Arthur Dunger for the nice explanation.