Can anyone please tell me which is suitable openwrt
firmware for D-link dsl-2750u h/w- V2. Please help its urgent. Thank you in advance.
This device seems to be based on RTL8676S.
There is currently no OpenWRT support for that platform, and probably never will be.
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Thanks for reply. How to find out exactly what are the hardware details of this router?
There are different hardware revisions of DSL-2750U, yours seems to be Revision V for the Middle East market, using a Realtek SoC.
The Link you provided shows a Broadcom SoC, thus it seems to be Revision C for the Indian market. There is apparently another Revision U for the Indian market.
Honestly, this stuff can be quite hard to find sometimes, but then again it's also part of the fun about trying to port OpenWRT 
Deviwiki as well as fccid.io can often be helpful:
https://deviwiki.com/wiki/D-Link_DSL-2750U_rev_C1
Oh, and by the way, there is also yet another model named DSL-2750B for the German market (using Annex B)... 
Yes indeed it is based on Realtek RTL8676S. I think I too have the same model and hardware version as OP (DSL-2750U P/N: ISL2750UEME3.V2E). Was reading up in preparation for OpenWrt flash on this ADSL modem/router that I came across this forum post.
Here are some images that will confirm @s_2 's point.
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