Hi ​@Janban, 

Yes Zante (Zakynthos) is in Greece, so you can use your iD Mobile plan there as part of the applicable inclusive roaming allowance. iD Mobile confirms that its inclusive roaming destinations allow customers to use their plan's minutes, texts and data while abroad, subject to the applicable allowance.

Before you travel, we'd strongly recommend setting your Bill Cap to £0 to help prevent unexpected out-of-plan charges if your handset connects to a chargeable roaming network.

We'd also recommend checking that your account and handset are correctly set up for roaming. You can follow iD Mobile's step-by-step guide here:

Have a great trip!