British telecom group BT and U.S. mobile operator Verizon announced Monday an agreement to combine their international operations serving corporate clients into a joint venture with combined annual revenue of around $4 billion.

The joint venture will serve more than 3,000 customers across over 180 countries.

BT and Verizon are merging their international enterprise operations into a new 50:50 joint venture, aiming to serve multinational clients with a combined annual revenue of $4…