I’m currently awaiting my SIM to be delivered as I’m wanting to try ID Mobile, but have a question about data usage whilst roaming in the EU (specifically Spain).
I know that since I’m paying £8 per month for 30GB of data I have an Open Data Policy fair usage limit of 6.17GB. I see on the info page that it states that the surcharge does not apply to data add-ons.
I would therefore like to know if I can purchase a data add-on (15GB for £30) so that I can use more than my 6.17GB allowance whilst abroad and avoid the surcharge. If so, would this add-on kick in as soon as I’ve used my 6.17GB ODP allowance, or would I be charged a surcharge on 23.83GB (my 30GB allowance minus the 6.17GB ODP limit) and then start using the add-on, or would the add-on avoid the surcharge altogether?