Last month, Google launched a referral program for Project Fi to attract more customers. Simply by referring someone to Google’s service, you and the person who was referred could get a $20 credit. The referral program was supposed to run through the 11th of January, but due to the huge response Google saw, it has now been extended indefinitely according to the company.

Project Fi is Google’s experimental wireless service. The search giant has partnered with Sprint, T-Mobile, and U.S. Cellular to provide data and phone service. It also lets you access secure and stable public Wi-Fi networks with Google’s own layer of encryption. The idea is simple: you pay a flat fee each month for data, and Project Fi will seamlessly switch between the three aforementioned carriers’ networks to give you the best coverage possible.

The catch is that even though you can get a data-only Fi SIM card for your laptop or your tablet, in order to have phone service as well, you need to have one of the following devices: Google Pixel, Nexus 5X, or Nexus 6P. Perhaps because of this restriction, Project Fi never really gave enough of an incentive for users to switch from their more conventional networks. And that’s where the $20 referral comes in.

As a holiday gift, Google ran a promotion where an existing customer could provide a referral code to up to ten new customers. If a new customer signs up using the code and stays in good standing for 30 days, both the referrer and the referred would get a $20 credit. And apparently, it served its purpose well. Due to “huge response from the customers,” the search giant has decided to extend the promotion date indefinitely. Google does warn that the referral program may end at any time, however, so you might want to get on it sooner than later if Project Fi sounds like something that might suit you.

Due to “huge response from the customers,” the search giant has decided to extend the promotion date indefinitely.

As 9to5Google advises, both the referring user and the referred can see each other’s names and referral status, so that’s something to keep in mind. And again, if you want data as well as phone service, you will need to have a Google Pixel, Nexus 5X, or Nexus 6P.

Have you switched to Project Fi? How does it compare to your regular carrier? Let us know in the comments below!

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