"ICRA is of the opinion that prominent reasons for deterioration in service quality are expanding data volumes, which have exerted pressure on the overall network, and a slowdown in capital expenditure (capex) on network rollout or upgradation by telcos," ICRA Senior Vice-President Sabyasachi Majumdar said in a statement.
Of late, quality of services has come under the scanner, given frequent call drops.
"The capex intensity, in turn, was constrained over the last few years largely on account of the fact that telcos had to deploy funds towards spectrum acquisition," ICRA said.
Furthermore, the government is gearing up for the largest ever spectrum auction where radiowaves worth Rs 5.36 lakh crore will be put up for sale.
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The industry has asked the government to defer the auction in the premium 700 Mhz band, which alone has potential to fetch bids of over Rs 4 lakh crore. The government, however, has decided to go ahead with auction of all available airwaves.
According to ICRA, performance on quality of service metrics is critical and the telcos cannot afford poor customer experience, especially in data services.
It said the deterioration in quality metrics coincides with the period of strong growth in mobile data traffic following rollout of data services by all telecom operators, attractive data tariffs, and increasing penetration of smartphones.
The intensity of network capex for Indian telecom
operators is lower than 20-22 per cent for many major telecom service providers internationally and much lower than that of telcos in China, where it is in excess of 30 per cent, it said.
"ICRA expects this momentum to be maintained in the medium term.