State-owned BSNL’s 4G technology will be upgraded to 5G in 5-7 months and rolled out across 1.35 lakh telecom towers the company has in the country, Union telecom and railway minister Ashwini Vaishnaw said on Thursday. While speaking at a CII event, the minister said the government has plans to increase the telecom technology development fund from Rs. 500 crore per annum to Rs. 4,000 crore to encourage indigenous innovation.