[Xiaomi Redmi 2 ROMs, Kernels, Recoveries, & Other ] pirej:
I tried to ping google.com, and google's dns (8.8.8.8) using LTE and WIFI, and there is nothing wrong,

u0_a70@android:/ $ ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=53 time=214 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=53 time=54.9 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=53 time=61.9 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=53 time=56.0 ms
64 bytes from 8.8.8.8: icmp_seq=5 ttl=53 time=62.8 ms
64 bytes from 8.8.8.8: icmp_seq=6 ttl=53 time=55.4 ms
64 bytes from 8.8.8.8: icmp_seq=7 ttl=53 time=63.3 ms
64 bytes from 8.8.8.8: icmp_seq=8 ttl=53 time=55.3 ms
64 bytes from 8.8.8.8: icmp_seq=9 ttl=53 time=61.6 ms
64 bytes from 8.8.8.8: icmp_seq=10 ttl=53 time=57.4 ms
64 bytes from 8.8.8.8: icmp_seq=11 ttl=53 time=62.5 ms
64 bytes from 8.8.8.8: icmp_seq=12 ttl=53 time=54.7 ms
64 bytes from 8.8.8.8: icmp_seq=13 ttl=53 time=62.4 ms
64 bytes from 8.8.8.8: icmp_seq=14 ttl=53 time=57.2 ms
64 bytes from 8.8.8.8: icmp_seq=15 ttl=53 time=55.6 ms
64 bytes from 8.8.8.8: icmp_seq=16 ttl=53 time=54.4 ms
64 bytes from 8.8.8.8: icmp_seq=17 ttl=53 time=51.9 ms
64 bytes from 8.8.8.8: icmp_seq=18 ttl=53 time=64.7 ms
64 bytes from 8.8.8.8: icmp_seq=19 ttl=53 time=54.0 ms
64 bytes from 8.8.8.8: icmp_seq=20 ttl=53 time=54.7 ms
64 bytes from 8.8.8.8: icmp_seq=21 ttl=53 time=56.3 ms
64 bytes from 8.8.8.8: icmp_seq=22 ttl=53 time=56.6 ms
64 bytes from 8.8.8.8: icmp_seq=23 ttl=53 time=56.3 ms
64 bytes from 8.8.8.8: icmp_seq=24 ttl=53 time=54.5 ms
64 bytes from 8.8.8.8: icmp_seq=25 ttl=53 time=54.3 ms
64 bytes from 8.8.8.8: icmp_seq=26 ttl=53 time=56.6 ms
64 bytes from 8.8.8.8: icmp_seq=27 ttl=53 time=57.5 ms
64 bytes from 8.8.8.8: icmp_seq=28 ttl=53 time=55.5 ms
64 bytes from 8.8.8.8: icmp_seq=29 ttl=53 time=53.5 ms
64 bytes from 8.8.8.8: icmp_seq=30 ttl=53 time=56.3 ms
64 bytes from 8.8.8.8: icmp_seq=31 ttl=53 time=55.0 ms
64 bytes from 8.8.8.8: icmp_seq=32 ttl=53 time=55.1 ms
64 bytes from 8.8.8.8: icmp_seq=33 ttl=53 time=53.3 ms
64 bytes from 8.8.8.8: icmp_seq=34 ttl=53 time=62.2 ms
64 bytes from 8.8.8.8: icmp_seq=35 ttl=53 time=57.0 ms
64 bytes from 8.8.8.8: icmp_seq=36 ttl=53 time=55.7 ms
64 bytes from 8.8.8.8: icmp_seq=37 ttl=53 time=56.4 ms
64 bytes from 8.8.8.8: icmp_seq=38 ttl=53 time=56.4 ms
64 bytes from 8.8.8.8: icmp_seq=39 ttl=53 time=55.1 ms
64 bytes from 8.8.8.8: icmp_seq=40 ttl=53 time=54.1 ms
64 bytes from 8.8.8.8: icmp_seq=41 ttl=53 time=54.3 ms
64 bytes from 8.8.8.8: icmp_seq=42 ttl=53 time=56.4 ms
64 bytes from 8.8.8.8: icmp_seq=43 ttl=53 time=64.3 ms
64 bytes from 8.8.8.8: icmp_seq=44 ttl=53 time=55.8 ms
64 bytes from 8.8.8.8: icmp_seq=45 ttl=53 time=57.7 ms
64 bytes from 8.8.8.8: icmp_seq=46 ttl=53 time=54.8 ms
64 bytes from 8.8.8.8: icmp_seq=47 ttl=53 time=53.3 ms
64 bytes from 8.8.8.8: icmp_seq=48 ttl=53 time=53.3 ms
64 bytes from 8.8.8.8: icmp_seq=49 ttl=53 time=55.2 ms
64 bytes from 8.8.8.8: icmp_seq=50 ttl=53 time=56.7 ms
64 bytes from 8.8.8.8: icmp_seq=51 ttl=53 time=65.1 ms
64 bytes from 8.8.8.8: icmp_seq=52 ttl=53 time=57.8 ms
64 bytes from 8.8.8.8: icmp_seq=53 ttl=53 time=55.5 ms
64 bytes from 8.8.8.8: icmp_seq=54 ttl=53 time=52.8 ms
64 bytes from 8.8.8.8: icmp_seq=55 ttl=53 time=56.9 ms
64 bytes from 8.8.8.8: icmp_seq=56 ttl=53 time=53.7 ms
64 bytes from 8.8.8.8: icmp_seq=57 ttl=53 time=56.0 ms
64 bytes from 8.8.8.8: icmp_seq=58 ttl=53 time=67.3 ms
64 bytes from 8.8.8.8: icmp_seq=59 ttl=53 time=63.7 ms
64 bytes from 8.8.8.8: icmp_seq=60 ttl=53 time=56.5 ms
64 bytes from 8.8.8.8: icmp_seq=61 ttl=53 time=53.7 ms
64 bytes from 8.8.8.8: icmp_seq=62 ttl=53 time=54.2 ms
64 bytes from 8.8.8.8: icmp_seq=63 ttl=53 time=56.4 ms
64 bytes from 8.8.8.8: icmp_seq=64 ttl=53 time=54.3 ms
64 bytes from 8.8.8.8: icmp_seq=65 ttl=53 time=54.2 ms
64 bytes from 8.8.8.8: icmp_seq=66 ttl=53 time=53.3 ms
64 bytes from 8.8.8.8: icmp_seq=67 ttl=53 time=56.4 ms
64 bytes from 8.8.8.8: icmp_seq=68 ttl=53 time=57.3 ms
64 bytes from 8.8.8.8: icmp_seq=69 ttl=53 time=53.7 ms
64 bytes from 8.8.8.8: icmp_seq=70 ttl=53 time=57.3 ms
64 bytes from 8.8.8.8: icmp_seq=71 ttl=53 time=54.1 ms
64 bytes from 8.8.8.8: icmp_seq=72 ttl=53 time=56.7 ms
64 bytes from 8.8.8.8: icmp_seq=73 ttl=53 time=53.8 ms
64 bytes from 8.8.8.8: icmp_seq=74 ttl=53 time=56.0 ms
64 bytes from 8.8.8.8: icmp_seq=75 ttl=53 time=57.5 ms
64 bytes from 8.8.8.8: icmp_seq=76 ttl=53 time=52.1 ms
64 bytes from 8.8.8.8: icmp_seq=77 ttl=53 time=56.1 ms
64 bytes from 8.8.8.8: icmp_seq=78 ttl=53 time=55.7 ms
64 bytes from 8.8.8.8: icmp_seq=79 ttl=53 time=52.3 ms
64 bytes from 8.8.8.8: icmp_seq=80 ttl=53 time=53.9 ms
64 bytes from 8.8.8.8: icmp_seq=81 ttl=53 time=54.6 ms
64 bytes from 8.8.8.8: icmp_seq=82 ttl=53 time=57.8 ms
64 bytes from 8.8.8.8: icmp_seq=83 ttl=53 time=54.7 ms
64 bytes from 8.8.8.8: icmp_seq=84 ttl=53 time=53.3 ms
64 bytes from 8.8.8.8: icmp_seq=85 ttl=53 time=63.4 ms
64 bytes from 8.8.8.8: icmp_seq=86 ttl=53 time=57.3 ms
64 bytes from 8.8.8.8: icmp_seq=87 ttl=53 time=55.3 ms
64 bytes from 8.8.8.8: icmp_seq=88 ttl=53 time=57.3 ms
64 bytes from 8.8.8.8: icmp_seq=89 ttl=53 time=52.2 ms
64 bytes from 8.8.8.8: icmp_seq=90 ttl=53 time=53.6 ms
64 bytes from 8.8.8.8: icmp_seq=91 ttl=53 time=63.3 ms
64 bytes from 8.8.8.8: icmp_seq=92 ttl=53 time=56.8 ms
64 bytes from 8.8.8.8: icmp_seq=93 ttl=53 time=54.7 ms
64 bytes from 8.8.8.8: icmp_seq=94 ttl=53 time=56.8 ms
64 bytes from 8.8.8.8: icmp_seq=95 ttl=53 time=56.8 ms
64 bytes from 8.8.8.8: icmp_seq=96 ttl=53 time=57.6 ms
64 bytes from 8.8.8.8: icmp_seq=97 ttl=53 time=54.3 ms
64 bytes from 8.8.8.8: icmp_seq=98 ttl=53 time=56.3 ms
64 bytes from 8.8.8.8: icmp_seq=99 ttl=53 time=57.4 ms
64 bytes from 8.8.8.8: icmp_seq=100 ttl=53 time=58.4 ms
64 bytes from 8.8.8.8: icmp_seq=101 ttl=53 time=52.8 ms
64 bytes from 8.8.8.8: icmp_seq=102 ttl=53 time=56.1 ms
64 bytes from 8.8.8.8: icmp_seq=103 ttl=53 time=53.5 ms
64 bytes from 8.8.8.8: icmp_seq=104 ttl=53 time=56.8 ms
64 bytes from 8.8.8.8: icmp_seq=105 ttl=53 time=55.3 ms
64 bytes from 8.8.8.8: icmp_seq=106 ttl=53 time=53.9 ms
64 bytes from 8.8.8.8: icmp_seq=107 ttl=53 time=55.0 ms
64 bytes from 8.8.8.8: icmp_seq=108 ttl=53 time=59.5 ms
64 bytes from 8.8.8.8: icmp_seq=109 ttl=53 time=53.5 ms
64 bytes from 8.8.8.8: icmp_seq=110 ttl=53 time=56.3 ms
64 bytes from 8.8.8.8: icmp_seq=111 ttl=53 time=62.3 ms
64 bytes from 8.8.8.8: icmp_seq=112 ttl=53 time=58.2 ms

If its not your isp.. then maybe there is something on your side.. like some app/service that is doing something..