It's awesome to see that you are making enquiries about the Samsung Galaxy S8+ within Giffgaff's Phone range @alexpessotti78 🙂 https://giffgaff.com/mobile-phones/samsung/samsung-galaxy-s8-plus/phone-details
Giffgaff's SIM Only deals (Goodybag Plans and Airtime Credit Top-up) would be separate to your phone purchase, at least going-forward. The price you see displayed on-screen is for the phone only, any SIM only deals would be extra. With Giffgaff you have no contract with the SIM Only deals, you are free to stay, free to go.
ALREADY AN ACTIVE GIFFGAFF MEMBER?
If you are buying a Phone from giffgaff and you already have an active Giffgaff SIM in use and you are an existing Giffgaff member, please login to your Giffgaff account first and then buy your Samsung Galaxy S8+ . Logging into your account before your Phone purchase means that you can bypass the need to purchase Goodybag Plan during your Phone purchase, as you will see the option "I already have a Goodybag" appear. Please select "I already have a Goodybag" option if you don't require a Goodybag during your Phone purchase.
Every Phone sold by Giffgaff comes with a spare SIM card, these are Trio SIM cards (all SIM sizes available in one SIM, a Micro and Nano SIM card pop out of the main standard Mini SIM). This can be ideal if you are an existing Giffgaff member and the SIM card size is different in your new Phone to the Phone you are currently using. You would simply need to perform a SIM Swap procedure. This transfers your number and any credit/goodybags you have onto your new sized Giffgaff SIM card.
Please view SIM Swap Guide (What Is SIM Swap). It will show you how to perform the SIM Swap procedure. It also includes an awesome video tutorial, created by Giffgaff member Flaxvert.
I AM NOT A GIFFGAFF MEMBER?
If you don't have an active giffgaff SIM (and associated giffgaff account), you would be required to purchase a £ 10.00 (or more) goodybag with your Samsung Galaxy S8+ purchase. Goodybags are one calendar month plans and there is no commitment to purchase these in future, if not required (please ensure that Recurring Goodybag and Auto Top-up options are disabled (switched OFF) in your Details to avoid future automatic purchases).
All Phones sold by Giffgaff are unlocked (and stay unlocked), meaning that you can use another network SIM, should you desire.
Want to try Giffgaff and are interested in our Goodybag Plans? Every Giffgaff Phone comes with a spare SIM card, these are Trio SIM cards (all SIM sizes available in one SIM, a Micro and Nano SIM card pop out of the main standard Mini SIM). This can be used for SIM card Activation if you are new to giffgaff and want to try our network.
* Activate your Giffgaff SIM card link
* Guide: Getting Started – Activating Your New SIM
Goodybags offer great value and are a mix of minutes, texts and data allowance. Goodybags last for one calendar month. can be viewed and purchased here, if required. Please remember, giffgaff don't offer contracts for the SIM only deals (Goodybags and Airtime Credit Top-up), meaning you are free to stay and free to go, at anytime 🙂 .
PHONE LOANS - PROVIDED BY RATESETTER
RateSetter are Giffgaff's loan partner. You can apply for a RateSetter loan to enable you to purchase a Smartphone from Giffgaff via monthly payments. There's more information regarding this here for you https://community.giffgaff.com/t5/Getting-started/. RateSetter are a peer-2-peer lending company https://giffgaff.com/peer-2-peer-lending
Would you like to know more information about purchasing a Phone from giffgaff? Please follow this link to view https://community.giffgaff.com/t5/Getting-started/Buying-a-giffgaff-phone/ta-p/10441209