Claro serves customers in Argentina, Brazil, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Puerto Rico and Uruguay.

As of 2006, Claro competed with international operators such as Tigo (Millicom), Personal (Telecom Argentina-Telecom Italia) and VOX (formerly KDDI.

In Brazil, Claro was launched in 2003 with the merger of América Móvil-owned operators ATL (serving the states of Rio de Janeiro and Espírito Santo), BCP (with service in São Paulo metropolitan area, Pernambuco, Alagoas, Ceará, Paraíba, Piauí and Rio Grande do Norte), Americel (operating in Acre, Tocantins, Rondônia, the Distrito Federal, Goiás, Mato Grosso, Mato Grosso do Sul), Tess Celular (other areas of São Paulo state) and Claro Digital (serving Rio Grande do Sul).

Claro later expanded its service to the states of Bahia, Sergipe, Santa Catarina, Paraná and Minas Gerais.

[4] Tigo and Movistar offer prepaid customers flat-rate per-minute plans for calls placed to all mobile service providers and landlines within Colombia (229 and 199 pesos per minute, respectively).

Superintendencia de Tele-Comunicaciones (SUTEL) of Costa Rica secured a license, and the company began offering lines on November 5, 2011 to users who had registered on their website or through social networks.

Its Dominican Republic slogans have included "Claro que tienes más" ("Of Course you have more"), "La Red donde todo es posible" ("The network where everything is possible"), and recently, "Estamos para ti" ("We are for you").

In addition to enhancing its 4G network footprint, the telco is also planning to begin 5G trials in Quito and Guayaquil.

Claro (formerly CTE Telecom) is a mobile and fixed phone, broadband and television service provider in El Salvador.

In 2000, it joined América Móvil and some time after it renamed the brands ALO and PCS Digital to Claro on Guatemala.

Oceanic Digital Jamaica Limited (ODJ) was a wholly owned subsidiary of América Móvil, providing service under the Claro name.

[11] The Jamaican company was acquired by Digicel in late 2011, and the network was closed (with permission from the outgoing Jamaica Labour Party government) in March 2012.

In 2012 Claro Americas was a partner in the (RED) Campaign with Adidas, American Express, Converse, China UnionPay, Legea and Servientrega.

The campaign's mission is to prevent the transmission of the HIV virus from mother to child by 2015, with a slogan "Fighting For An AIDS Free Generation".