As of 2021, the top 10 telecommunication companies in terms of revenue are:
1. AT&T Inc.
2. Verizon Communications Inc.
3. China Mobile Ltd.
4. Huawei Investment & Holding Co., Ltd.
5. Deutsche Telekom AG
6. Nippon Telegraph and Telephone Corporation (NTT)
7. SoftBank Group Corp.
8. Telefónica S.A.
9. Vodafone Group Plc
10. América Móvil SAB de CV
