Exhibit 12 MICHIGAN BELL TELEPHONE COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Dollars in thousands) 					 Three Months Three Months 					 Ended Ended 					 March 31 March 31 					 1994 1993 		 1. Earnings 		 (a) Income before interest 	expense and income taxes $17,404 $133,579 		 (b) Single Business Tax 7,350 6,870 		 (c) Portion of rental expense 	 representative of the 	 interest factor (1) (2) 3,195 3,505 		 	 Total 1.(a) through (c) $27,949 $143,954 		 2. Fixed Charges 		 (a) Total interest deductions $23,887 $27,195 		 (c) Portion of rental expense 	 representative of the 	 interest factor (1) (2) 3,195 3,505 		 	 Total 2.(a) and (b) $27,082 $30,700 		 		 3. Ratio (1. divided by 2.) 1.03 (3) 4.69 		 		 (1) The Company considers 1/3 of rental expense to be the amount representing return on capital and therefore it must be included in fixed charges. (2) Earnings are income before income taxes and fixed charges. Since the Single Business Tax and rental expense have already been deducted, the Tax and the 1/3 portion of rental expense considered to be fixed charges are added back. (3) The results for the first quarter of 1994 reflect a $137.8 million pre- tax charge for work force restructuring (see M,D&A discussion of this charge). This charge will be primarily funded from the Ameritech pension plan.