Unfortunately it is not reinforced signal may have to put the antenna more powerful or higher up ?
product is amazing. it does 27db increase. so signal on phone shows immediate increase in db to about -85 from -110. yes it seems to work on airtel 4g too here in india. it is 900 1800 and 2100. so I thought airtel is on 2300. but it seems to work. I have seen increase in phone signal but need more time to give verdict. local market says 15000rupee for tri band. but I paid 7500 plus customs of 2500. so net is 10k and I got top of line. performance review after I month. also outdoor antenna is lpad and is vertically aligned. pointed towards the cell tower.