Reliance Jio has approached the telecom department's Telecommunication Engineering Centre (TEC) to seek approval to use radiowaves in a 26 GHz band for WiFi services. The request was made last week, sources said. According to sources, Jio has approached TEC - the technical arm of the Department of Telecommunications (DoT) - seeking approval to use radiowaves in the 26 GHz band for WiFi services. An email sent to Jio did not elicit a response. It is pertinent to mention that the Notice Inviting Application (NIA) or the bid document for the 2022 auction specifies that prior clearance is a must in case the spectrum assigned for 5G is being used for other technology.Also Read: Airtel approaches Jio, VIL on joint telecom initiative against fraud "In case of switching over to a different technol