As many of you must have noticed, If you have two SIM card on your phone (Jio + Non-Jio) and when you run 4G LTE on the non-Jio SIM card, the network on the Jio SIM vanishes. That’s because Jio only works with 4G LTE networks and your phone can connect only one SIM to 4G LTE at a time.
The next generation chipsets will, however, resolve this issue. Dual VoLTE will allow you to keep HD Calls active on both SIM cards thus enhancing your calling experience while liberating you to choose to run data or call on both 4G VoLTE enabled and regular carrier SIM card.
At the end of the day, Dual VoLTE support shall result in better call quality (HD or Ultra HD) on both SIM cards simultaneously. And you will have the option to be able to use Data on a non-Jio sim card without giving up on Jio’s free calling privileges.
Currently, Qualcomm Snapdragon 660, Qualcomm Snapdragon 636, Huawei’s Kirin 970 and MediaTek’s Helio P60 support Dual SIM Dual VoLTE.
Nokia 7 plus came with a Snapdragon 660, but it didn't support dual VoLTE. This is about to change.
On his reply to a review of the Nokia 7 plus, Juho Sarvikas announced that the 2nd sim will support LTE shortly!
Thanks Sid for the awesome review and don't worry, 2nd sim will support LTE shortly!— Juho Sarvikas (@sarvikas) May 4, 2018
This is a great news, especially for the Indian users. But we would like to see dedicated slots for the second sim and the microSD card, instead of the hybrid slot, so that we don't need to choose between a second sim and a microSD.