@Solla-topee hi, I tried the option of changing the channel from auto to 40 & now its working fine whereas 2.4 ghz also changed to 1 but not as speedy as before. But I am satisfied since I opt for 5...

Hi, I have an Alcatel Lucent G- 240W -B router (dual band). I bought TP link RE450 extender. Just yesterday 2.4 & 5 G were working. But today 5G started dropping signal with no internet connection...