Exhibit 7.1

América Móvil, S.A.B. de C.V. and Subsidiaries

Computation
of Ratio of Earnings to Fixed Charges

Amounts in Thousands of Mexican pesos, Except Ratios



|                                   |  |                                             |     |  |             |   |     |  |             |  
|---------------------------------- |  | ------------------------------------------- | --- |  | ----------- | - | --- |  | ----------- | -
|                                   |  |                                             |     |  | 2009        |   |     |  | 2010        |  
|                                   |  |                                             |    
|IFRS                               |  |                                             |     |  |             |   |     |  |             |  
|Earnings:                          |  |                                             |     |  |             |   |     |  |             |  
|                                   |  | Profit before income tax                    |     |  | 143,200,212 |   |     |  | 135,119,043 |  
|                                   |  | Plus:                                       |     |  |             |   |     |  |             |  
|                                   |  | Interest expense                            |     |  | 16,564,152  |   |     |  | 19,934,283  |  
|                                   |  | Interest implicit in operating leases       |     |  | 588,565     |   |     |  | 411,202     |  
|                                   |  | Less:                                       |     |  |             |   |     |  |             |  
|                                   |  | Equity interest in net income of affiliates |     |  | (1,959,378  | ) |     |  | (1,671,211  | )
|                                   |  |                                             |     |  |             |   |     |  |             |  
|                                   |  |                                             |     |  | 158,393,550 |   |     |  | 153,793,316 |  
|                                   |  |                                             |     |  |             |   |     |  |             |  
|                                   |  |                                             |    
|Fixed charges:                     |  |                                             |     |  |             |   |     |  |             |  
|                                   |  | Interest expense                            |     |  | 16,564,512  |   |     |  | 19,934,283  |  
|                                   |  | Interest implicit in operating leases       |     |  | 588,565     |   |     |  | 411,202     |  
|                                   |  |                                             |     |  |             |   |     |  |             |  
|                                   |  |                                             |     |  | 17,153,077  |   |     |  | 20,345,485  |  
|                                   |  |                                             |     |  |             |   |     |  |             |  
|                                   |  |                                            
|Ratio of earnings to fixed charges |  |                                             | 9.2 |  |             |   | 7.6 | 
|                                   |  |                                             |     |  |             |   |     |  |             |