Other data roaming services (such as sending emails and pictures or web-browsing from mobile phones or laptops) will be regulated at wholesale level – i.e. there will be a price cap for the rates the host operator charges a roaming customer’s home operator, calculated on a kilobyte basis:

from 1 July 2009: a maximum of €1.00 per megabyte (excluding VAT);
from 1 July 2010: a maximum of €0.80 per megabyte (excluding VAT);
from 1 July 2011: a maximum of €0.50 per megabyte (excluding VAT).

To prevent "bill shocks", roaming customers would be able to opt free of charge for a maximum financial limit from 1 March 2010, stipulates the compromise. One of these financial limits should be set at €50 (excluding VAT) or the corresponding data volume, agreed MEPs and the Presidency. This limit would automatically apply to all customers who have not made another choice by 1 July 2010, says the compromise text.

The informal agreement says that providers will have to warn their customers when 80% of the agreed limit has been reached. Once the limit is reached, another notification should be sent, indicating the procedure to be followed if the customer wishes to continue data roaming. If the user does not respond the provider should cease all data roaming services.