India's oldest telecom company BSNL is expanding its 4G network. Now the company has started 4G availability in Madurai, Tamil Nadu. Now BSNL's 4G service has been expanded to 4 circles in Tamil Nadu. This includes Coimbatore, Salem, Trucchi and Madurai. Data speeds up to 12 Mbps are being provided in these cities. BSNL has a big problem in the matter that it is looking to expand its 4G coverage but it does not have a 4G license. However, the Principal General Manager of Madurai of BSNL has given a solution for this. Let's know in full detail Xiaomi Mi CC9 Pro smartphone will be launched soon, camera quality is amazing For your information, tell that BSNL can use 139 base towers for 4G service in Madurai. In this case, GM SE Rajam of Madurai said that BSNL should discontinue its 3G mobile service and then provide 4G service. That is, the company will provide its 4G service through 139 base towers. People who are using 3G service will not get the benefit of data services until they upgrade to 4G SIM. Out of 823 BTS, 139 BTS will be used for 4G service. The rest of the BTS will be used for 2G networks. Redmi 8 smartphone can be economical for customers, know the launch date Apart from this, the company has said that users who do not upgrade to 4G SIM will not be able to use high-speed data. The GM of the company has said that BSNL has communicated to its users to change the SIM through SMS, IVRS calls and manual calls. He told that he will be able to change the SIM without any extra charge. Currently, 82,000 users are using 2G service in Madurai. Let us tell you that users outside Madurai will have to pay 100 rupees separately for the SIM upgrade. Google Pixel 4 smartphone's leaked feature out, this is complete information