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Continue to ChatOi replica la estrategia de sus competidores con refarming en 1800 MHz https://www.telesemana.com/blog/2017/08/28/oi-replica-la-estrategia-de-sus-competidores-con-refarming-en-1800-mhz/
Oi replica la estrategia de sus competidores con refarming en 1800 MHz https://www.telesemana.com/blog/2017/08/28/oi-replica-la-estrategia-de-sus-competidores-con-refarming-en-1800-mhz/