Exhibit 8.1

List of certain subsidiaries of América Móvil, S.A. de C.V.



|                                                            |  |              |  |                      |   |  |                    
|----------------------------------------------------------- |  | ------------ |  | -------------------- | - |  | -------------------
|Name of Company                                             |  | Jurisdiction |  | OwnershipInterest(1) |   |  | Main Activity      
|AMX Tenedora, S.A de C.V                                    |  | Mexico       |  | 100.0                | % |  | Holding company    
|                                                            |  |              | 
|Sercotel, S.A. de C.V.                                      |  | Mexico       |  | 100.0                |   |  | Holding company    
|Radiomóvil Dipsa, S.A. de C.V.                              |  | Mexico       |  | 100.0                |   |  | Wireless           
|CTI Holdings, S.A.                                          |  | Argentina    |  | 100.0                |   |  | Holding company    
|CTI PCS, S.A.                                               |  | Argentina    |  | 100.0                |   |  | Wireless           
|CTI Compañía de Teléfonos del Interior, S.A.                |  | Argentina    |  | 100.0                |   |  | Wireless           
|Telecom Americas Ltd.                                       |  | Bermuda      |  | 98.9                 |   |  | Holding company    
|Americel S.A.                                               |  | Brazil       |  | 99.2                 |   |  | Wireless           
|Telet S.A.                                                  |  | Brazil       |  | 99.2                 |   |  | Wireless           
|BCP S.A.                                                    |  | Brazil       |  | 99.8                 |   |  | Wireless           
|Smartcom, S.A.                                              |  | Chile        |  | 100.0                |   |  | Wireless           
|Comunicación Celular S.A. (Comcel)                          |  | Colombia     |  | 99.2                 |   |  | Wireless           
|Consorcio Ecuatoriano de Telecomunicaciones, S.A. (CONECEL) |  | Ecuador      |  | 100.0                |   |  | Wireless           
|Compañía de Telecomunicaciones de El Salvador (CTE)         |  | El Salvador  |  | 95.8                 |   |  | Fixed-line/Wireless
|TracFone Wireless, Inc.                                     |  | Florida      |  | 98.2                 |   |  | Wireless           
|Telecomunicaciones de Guatemala, S.A.                       |  | Guatemala    |  | 99.1                 |   |  | Fixed-line         
|Servicios de Comunicaciones Personales Inalámbricas, S.A.   |  | Guatemala    |  | 99.1                 |   |  | Wireless           
|Servicios de Comunicaciones de Honduras, S.A. de C.V        |  | Honduras     |  | 100.0                |   |  | Wireless           
|Empresa Nicaragüense de Telecomunicaciones, S.A. (ENITEL)   |  | Nicaragua    |  | 99.3                 |   |  | Fixed-line/Wireless
|Servicios de Comunicaciones de Nicaragua, S.A               |  | Nicaragua    |  | 100.0                |   |  | Wireless           
|AMX Paraguay, S.A.                                          |  | Paraguay     |  | 100.0                |   |  | Wireless           
|América Móvil Perú, S.A.C.                                  |  | Peru         |  | 100.0                |   |  | Wireless           
|AM Wireless Uruguay, S.A.                                   |  | Uruguay      |  | 100.0                |   |  | Wireless           

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|(1) | Percentage of equity owned by América Móvil directly or indirectly through subsidiaries or affiliates.
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