Movistar is a major Spanish mobile phone operator owned by Telefónica S.A. operating in Spain and in many Latin American countries. It is the largest carrier in Spain with 22 million customers (cellphone services only)
I found this MSSQL Injection. By Adding ' WAITFOR DELAY '0:0:20'-- getting a positive response of 20-second delay. Proving this parameter SEOname is Vulnerable to SQL INJECTION.
I Report this to Movistar and they reply and FIX quick :)
Great job Movistar!