Have you used the phone with your iD SIM to do something not included in your UK plan allowances, ​@garydougan. 

Your bill should show itemised details for calls, SMS texts, mobile data, etcetera.

This community article might help.

Hey there ​@garydougan, we hope the kind advice from ​@andewhite has been able to help.

Just to check, have you recently:

1. Changed direct debit date?
2. Changed/upgraded your plan?
3. Used any out of contract charges?

Thanks,

Tyler

Why has my bill gone up from 27.99 to 31.64 this month I've haven't rang anyone done anything 

So all because I change my DD date it has gone up 31.64 so i have to pay this every month now how do I change it back 

Hi ​@Sonia goldsbury,

Thank you for getting in touch, and I’m really sorry to hear about the concern with your bill, I understand how frustrating that can be.

When a billing cycle date is changed, there is a once-off adjustment applied. This is outlined in the terms and conditions provided at the time of the change, which I have also provided below, and it means the first bill may be slightly higher because it covers a period longer than the usual 30 days.

Please rest assured that this is only temporary, and your billing will return to normal once the current bill has been settled. If anything still seems unclear or doesn’t look right, please let me know and I’ll gladly take a closer look for you.

T&C's for a bill date change:

• Due to the Direct Debit process, payment may come out of your bank account up to 3 working days after your nominated date.
• Your Direct Debit payment date will change from your next billing period. So if you've got a Direct Debit payment pending, it'll come out on the original due date.
• Your billing period will change to align with your new payment date.
• Your allowances will refresh on your new billing date.
• Your next billing month will be longer than usual. To ensure you've got enough allowances, they'll be pro-rated during this period (along with your line rental). This means your next bill will be higher than usual. For more information, visit Changing your Direct Debit payment date.

Regards,

Gemma M

The iD Mobile Social Media Team