Run this app, and choose ‘MTK Settings’. Then, choose BandMode and a SIM slot where you want the network to lock the LTE band. Then, scroll down to LTE mode and check the Band 40 for that will offer superior speed or the band 5 for a better coverage.
Read moreHow do I lock my Mediatek processor band?
Like if you have Mediatek chip then you need to download MTK Engineering app from play store. Under MTK Settings > Telephony > Band mode, you can select those band you wana to use for LTE. Thank you. then “preferred bandwidth” select bandwidth on which u want to lock your mob.3 Nis 2017
Read moreHow do I lock my 4G network to band 40?
Method 1: Lock the 4G network to Jio Band 40
Read moreWhat is band locking?
You can lock the device to a subset of its supported frequency bands on LTE, WCDMA, or GSM . Note that this operation will result in no service if you prevent the use of all bands that are available at the current location.
Read more