You can have Airtime Pay-as-you-go credit (expensive, but needed fMS & when outside the UK & EU coountries) & a Goodybag (reasonable rices & lots to choose from) - I have both. New members find the 2 Giffgaff tariffs confusing so I have included the following information for you.
***The difference between GOODYBAGS & AIRTIME: The 2 Giffgaff Tariffs***
*****GOODYBAG is a monthly allowance for Texts, Calls & Data, plus free Giffgaff to Giffgaff calls - it expires at the end of 30 or 31 days from when you bought it.
Goodybag minutes can be used to call any UK landline numbers that start with 01, 02, 03, and UK mobiles starting with 071 to 075 and 077 to 079.
*****AIRTIME is a PAY- AS-YOU-GO allowance which is used for Multimedia Message Services (MMS), used abroad, for outside the EU area & for 0870, 118 etc. numbers & lasts until it runs out. Plus for the first 3 months after top-up you have free Giffgaff to Giffgaff calls.
****AIRTIME Charges: Calls @ 15p a minute, Texts 5p, Data 5p per MB, Voicemail 8p a call.
***** Picture messages (MMS) to giffgaff and other mobiles (max 300KB) 16p per MMS****
(Goodybags do NOT include MMS)
Click on this link to see all Calls & Tariffs to UK mobiles: https://giffgaff.com/pricing
You can buy both types of credit from your account's Homepage at www.giffgaff.com
If you do decide on a Goodybag you will be able to tick for it to re-occur on the same day each month.
I hope this info. helps.