Telhosting is a very limited solution and has nothing to offer that can't be offered by other website builders, too.
In addition, Telhosting has become faulty:
http://www.tel.community/t4550-inserting-of-header-images-and-pdf-files-fails
http://www.tel.community/t4551-telnic-could-we-please-adjust-our-user-settings-for-the-control-panel
http://www.tel.community/t4538-telnic-could-you-please-correct-spelling-mistakes
http://www.tel.community/t4552-smarter-redirection-of-tel-domains
http://www.tel.community/t4547-new-telhosting-bug
Furthermore, with opening of .tel for free webhosting it has no connection to its original DNS concept anymore.
There is only one option to use a .tel domain: build your own website with another available service - just like with any other domain.
The question is only if the term .tel has any value in comparison to 1,500 other generic domain extensions.