I was having problems connecting to my internet at home with my 4s. I tried many of the suggestions. Nothing worked. I did not want to sit on the phone with apple etc trying to fix it. I bought a router extender. It worked like a charm.

Question

I just want to let those of you who have problems connecting to home internet.  I had same problem with my 4s iphone and tried many of the suggestions here as well as on the internet.  Then I found something called an internet extender. Bought it and worked like a charm.  It was worth the $60 I paid.  No more hours of trying to figure it out.  I don't know if this will work for anyone else with this problem but if it helps you I'm happy

Answer 1

I would recommend that you do the following as a minimum:
Power-down the modem, AirPort Express base station, and computer(s).
Power-up the modem; wait at least 10-15 minutes to allow it adequate time to initialize.
Power-up the Express; wait at least 5-10 minutes. Note: The AirPort's status light may continue to flash amber after it has initialized. That is because, there may be some additional configuration items necessary, like setting up wireless security, before the overall setup is completed to get a green status.
Power-up your computer(s).
In this basic configuration, the Express will broadcast an unsecured wireless network with a Network Name (SSID) of Apple Network NNNNNN. Network clients, connected to the base station either by wire or wireless, should now be able to access the Internet through the ISP's modem. Once Internet connectivity has been verified, you can use the AirPort Utility to configure the base station for wireless security and any other desired options.
If the above steps do not solve the problem, start over with step 1 above, but then perform the next steps between steps 1 & 2. above.
Disconnect the Express from the Internet broadband modem.
While all of the devices are powered-down, perform a "factory default" reset on the Express. This will get it back to its "out-of-the-box" configuration and make setting it up much easier, especially if you use the "Assist me" process within the AirPort Utility. (ref: Resetting an AirPort Base Station or Time Capsule)
After the base station resets, go ahead and power it back down.
Reconnect the Express to the Internet broadband modem. For the 2nd generation Express, be sure to connect the cable to the base station's WAN (circle-of-dots) port.
Continue with step 2 in the first set of steps.