That is information you can find on your monthly bill.
Once Brexit enters into force, i.e. on 1 January 2021,the European regulatory framework, which results in low wholesale call termination rates, will no longer apply to UE service providers for communications between the EU and the United Kingdom, as of the date of withdrawal. This could lead to higher wholesale tariffs for the termination of calls from the EU to the United Kingdom.
These changes only concern sales by professionals to private individuals (B2C).
Example: an online purchase by a Belgian consumer on a Chinese platform.
To avoid any surprises, please check carefully from whom you are purchasing, especially if the VAT and the import duty are included in the selling price. Check your order and your invoice!
All you need to know about the new VAT e-commerce rules (Information for consumers in the EU).
More info avaliable on the website of the Federal Public Service FINANCE:
On 1 January 2021 current relations between the European Union and the United Kingdom will come to an end, whether a partnership agreement is concluded or not.
Starting from 1 January 2021 the United Kingdom (UK) will be treated as a non-EU country for customs purposes.
Parcels from and to the United Kingdom will have to follow the same procedure as that applied to third countries (non-EU countries), such as Canada or the United States. This means that these parcels must be accompanied by a customs form, which is necessary to be processed through customs.
For more information, we advise you to contact the Brexit Call Centre of the General Administration of Customs & Excise Duties. This contact centre is available from Monday to Friday from 9.00 a.m. to 4.30 p.m. at the phone number 0257/55.555.
For that we refer to the website of the FPS Mobility and FPS Economy
Once Brexit enters into force, i.e. on 1 January 2021, the European rules on international communications will no longer apply to calls and SMS messages from Belgium to the United Kingdom (and British numbers). As a consequence, operators will no longer be obliged to respect the tariff ceilings provided for in European legislation.
Operators which decide to no longer apply these tariff ceilings must notify their customers one month in advance of the new applicable tariffs.
Once Brexit enters into force, i.e. on 1 January 2021, the European rules on roaming will no longer apply in the United Kingdom.
Providers of roaming services to roaming customers (hereinafter “roaming services providers”) operating within the EU: