I have VIVO Y28 which I haves use for more than 1year, it was good but only problem with Vivo phone is contact, it automatically create duplicate contact. As Y28 model is discontinued by company and motherboard was damages they replaced me with Y21l at some cost of 5100 rs.
Phone is bit small, it is 4G supported, camera is also good only photograph come with red eyes:). Same problem of contact. I am unable to connect the phone through USB to laptop and take backup through VIVO app. Have tried lot and even VIVO call centre is unable to resolve the problem. Phone is good to use and friendly. Need to upgrade the features and reduce compulsory app which are stored in phone memory and cannot be more to SD card.