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“América Móvil increases its interest in Telekom Austria”

Mexico City, Mexico, September 25, 2012 -- América Móvil, S.A.B. de C.V. (“AMX”) (BMV: AMX; NYSE: AMX; NASDAQ: AMOV; LATIBEX: XAMXL), announced that after receiving the required regulatory approvals and as part of the transaction entered into on June 15, 2012, has acquired today an additional approximately 16% of the outstanding shares of Telekom Austria AG (“Telekom Austria”).

As of today and taking into account this transaction, AMX holds, directly and indirectly, approximately 22.76% of the outstanding shares of Telekom Austria.

This acquisition confirms AMX as a long-term strategic partner of Telekom Austria. It is part of AMX geographic diversification strategy and provides an attractive presence in Central and Eastern Europe.

Telekom Austria, the largest telecommunications company in the country, also provides telecommunication services in Belarus, Bulgaria, Croatia, Liechtenstein, Macedonia, Serbia and Slovenia. As of June 30, 2012, it had approximately 20 million wireless subscribers and 2.6 million fixed lines.

About AMX

AMX is the leading provider of wireless services in Latin America. As of June 30, 2012, it had approximately 252 million wireless subscribers and approximately 61 million fixed revenue generating units in the Americas.

Legal Disclaimer. This press release contains certain forward-looking statements that reflect the current views and/or expectations of AMX and its management with respect to its performance, business and future events. We use words such as “believe,” “anticipate,” “plan,” “expect,” “intend,” “target,” “estimate,” “project,” “predict,” “forecast,” “guideline,” “should” and other similar expressions to identify forward-looking statements, but they are not the only way we identify such statements. Such statements are subject to a number of risks, uncertainties and assumptions. We caution you that a number of important factors could cause actual results to differ materially from the plans, objectives, expectations, estimates and intentions expressed in this release. AMX is under no obligation and expressly disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.