New Delhi: Airtel on Tuesday blamed RJio itself for network connectivity issues and call failures, saying they are due to Jio’s own “under-preparedness”, insufficient testing efforts and acquiring a large number of customers at the pre-launch stage itself. In a letter to RJio, Airtel said: “While RJio has continued to allege huge call failure on account of insufficient number of PoIs (points of interconnect), however, we believe the prime reason for such call failures was on account of acquisition of a large number of subscribers by RJio even before the declaration of the commercial launch.” The letter, sent on Monday, goes on to say that augmentation of POIs based on actual traffic, necessitates a reciprocal action from the other party also. PTI