By Gustavo Palencia TEGUCIGALPA (Reuters) – Honduran telecoms company Tigo, a part of Swedens Millicom, said on Wednesday it is suing main local rival Claro, a unit of Mexican billionaire Carlos Slims America Movil, for what it called an unfair advertising campaign. Tigo said it is seeking damages of 280 million lempiras ($13 million) from Claro, which it accuses of putting out abusive propaganda that denigrates and discredits (its) products and services and is tantamount to unfair competition. In Honduras since 1986, Tigo dominates the cellphone market with 4.9 million of the countrys 7.5 million users, according to Honduras telecoms regulator Conatel.