Telus-owned Public Mobile has launched a flash sale from July 28-29 only, offering a free SIM card plus a 30-day plan for $0, when you activate your plan in-store (Walmart; London Drugs; K Mobile; Wow Mobile Boutique), available for new customers only.

All you need to do is visit a Public Mobile retailer, sign up for a 30-day plan with your free SIM, then you’ll gain your free month in the form of a credit, applied within 72 hours.

Public Mobile says, “For example, if you sign up on our current $35 for 1GB at 3G speed, Unlimited Canada-wide Talk and Unlimited International Text 30-day plan, your account will be credited $35 within 72 hours of activating.”

Also, Public Mobile has a promo 30-day plan right now, which costs $45 and includes 5.5GB of 3G speed data, along with unlimited Canada-wide calling.

There’s also a referral bonus going on right now, where both you and your friend can get $25 credit. If you need a referral for the $25 credit, email tips @iphoneincanada.ca.