can I activate my sim number and later add a new device plan?

Hi Jireh

Sure you can buy the phone whenever you need it

To sign up for Fizz mobile, please follow the instructions here: https://fizz.ca/en/how-it-works

Once you have your SIM card, go here: https://fizz.ca/activation

You will need to have a valid credit card on hand: https://fizz.ca/en/faq/what-payment-methods-can-i-use

If you transfer your number, here are the instructions:
https://fizz.ca/en/faq/activation-how-do-i-transfer-my-current-phone-number-to-fizz
Otherwise, you can select a new phone number.

Make sure your phone is unlocked and compatible with the Fizz network.
https://fizz.ca/en/faq/compatible-devices#2

Also note that the referral code you use must belong to an account with an active plan.
This is a good time to join Fizz as they are giving $50 bonus credit to new customers (until January 6 2021).

If you need a referral code, there is a list here:
https://community.fizz.ca/questions/2198337-place-referral-codes?answers_page=18

You can choose mine or the code of someone who has helped you.
To be transparent, both parties will receive the bonus credit once you have paid your second bill.

Welcome to Fizz!