I take a joi sim fue months ago for my 4g phone Asus Zenfone max. After activities the sim I found that I can’t use voice cl from my phone, because it doesn’t support Vo-lte service. The network quality is so poor out sides of city. One most negative part of the Reliance Jio is that not working in 2g or 3g phones. The voice call quality and clarity is so poor compared with other networks provider. The network data speed is so slow in day time accept the meed night. The most time of a day I see that the jio network is gone in my home area.