This extender has been working well for nearly a year but we had a mains supply failure and so had to reprogram the extender. When all set up there was no internet available from the extended signal even though I was seeing 4 bars on my tablet. When I checked wi fi settings on the tablet it showed a good signal from the extender but with the message "Connected without internet". I have tried a factory reset from the Tether app as well as from the extender itself but each time I finish up with the same result!. The wi fi output from the router was  and is working normally with good internet access. HELP!