@Soru@Debasish Sahoo My Experience with activating Vodafone IDEA VoLTE # Karnataka - Prepaid - VI SIM Roaming In Tamilnadu Balance - Rs. 10+ - On Annual Plan with Enough Data Balance. I was wondering why I got only 4G or 4G+ and not VOLTE. Whether in Karnataka or In TN. Called up customer care - Useless responses - multiple attempts, different people, they will send you a link which is practically useless. Went to a Vodafone Main Store - asked for someone with experience....A guy came, quickly understood the issue & said he will raise an SR (service request) by email from his end. Exactly within 24 hours, I got an SMS saying my SR has failed / closed. I restarted the mobile and I saw VoLTE appearing. The problem again was, VoLTE was not uniformly all across all towers. Dont know why!