Bro shuyina, can get the 7.17 version?

Make sure you note down your current config/passwords.
Flash/Upgrade only from wired connection.

That gives you a config.bin file that works for the same version of Firmware it was generated from. It may not work across different versions; I haven't tried. I only use it for restoring configuration for the same firmware.

Maybe someone else can tell you if it works.

What is the version of the firmware you are using? It could be DNS problem that 7.13 has...
See this for how to check
http://one-sick-psi-guy.blogspot.com/2012/...with-unifi.html
You could downgrade to 7.09/7.12 or upgrade to 7.15 or higher.

Very simple, from your wireless connection configuration utiliy (e.g. Intel ProSET Wireless), look at the properties of all the strong wireless networks around you. Check what is their Wireless Channel and try to set your own wireless router channel to something else at least 2 to 4 channels away from any other channels in use.

I am not having that problem. I could reconnect within 5 minutes or less. If you can always get connected but it takes 10 minutes... maybe just live with it (or go complain to TM if you're still under warranty), there are worse problems to have

If out of warranty and you want to change, suggest get a better TM compatible router...

Yes, there are TP-Link and ASUS models with full HyppTV (IPTV) support.
Please refer to
http://klseet.com/index.php/replacement-option-summary

Personally, if I were to replace and cost is not a factor, I would choose ASUS.

You must have left the TR-069 Protocol option enabled?
Have not been able to find the 7.17 download nor the password.
If this bothers you, you should downgrade back to 7.14