Telegram not connecting on BSNL Bharat Fiber Broadband

Yeah, I can ping from BSNL FTTH.


root@OpenWrt:~# ping -c 4 149.154.167.151


PING 149.154.167.151 (149.154.167.151): 56 data bytes


64 bytes from 149.154.167.151: seq=0 ttl=49 time=191.981 ms


64 bytes from 149.154.167.151: seq=1 ttl=49 time=193.335 ms


64 bytes from 149.154.167.151: seq=2 ttl=49 time=192.101 ms


64 bytes from 149.154.167.151: seq=3 ttl=49 time=198.556 ms





--- 149.154.167.151 ping statistics ---


4 packets transmitted, 4 packets received, 0% packet loss


round-trip min/avg/max = 191.981/193.993/198.556 ms
 
^^ Nice, my probe is on that list and and as expected failed.

Code:
root@bumblebee:~# mtr -w 149.154.167.151
Start: 2020-09-28T16:01:58+0530
HOST: bumblebee.varkey.io Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- 117.216.224.1        0.0%    10    1.9   4.3   1.9  21.2   5.9
  2.|-- 218.248.167.198      0.0%    10    2.3   3.1   2.3   3.7   0.5
  3.|-- 218.248.255.5       50.0%    10    3.7   3.4   3.1   3.7   0.2
  4.|-- ???                 100.0    10    0.0   0.0   0.0   0.0   0.0
root@bumblebee:~#
 
I too can't ping to 149.154.167.151.
But I can send and receive text using BSNL connection. Media content including images, videos or even stickers won't load.
I have been using MTProto proxies to overcome this problem, but now even with the added padding, media doesn't load. Trying with SOCKS5 proxy I could load the media.

For fun I tried running a SOCKS5 proxy on my local network and pointing telegram app to it. Weirdly, then I could download media through telegram!

Now I don't know whether the issue is with BSNL or with myself. But I can confirm that I'm able to load media through other ISPs without any proxies.
 
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@abbyck texting is routed through another ip address which is accessible via bsnl ftth and I even got no issues with texting. While downloading media the spinner is spinning with no effect. Even the media thumbnails are not loading. I think the app trying to connect to the above IP address/ range and getting timed out.
 
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