To calculate the NPV of a Mobile operator operation an important asset will be the number of postpaid subscribers the company will have at the moment of sale.
Please share your knowledge on examples of subscriber valuations:
Eg: Value, Company sold, Country, valuation, # of subscribers, year
$R 900, Telefonica acquires 50% of Brasicel to PT(that company owned 60% da Vivo), deal value R$ 18 Bi, Vivo had 60m subscribers,  2010
$R 604, Vivo purchased 100% of Telemig Celular, deal value R$ 2,9 Bi,  Telemig had 4,8M, 2007