m7 4g and LTE

[yoyomanx1]

hi guys I have htc one m7 and I have a LTE Sim but when I use mobile data it show 4G and it does not show LTE but my operator says I am using lte and in network information it says it is lte I just can't understand if I am using 4G or LTE

and speed is slow compared to other people who used it