I have my own smart, unlocked, phone (android). I use it for voice and text with "go-phone" sim card. I do not have data plan on the phone.
ATT signal at my house sux. Is there any way to use my home wi-fi router to conect to ATT for voice/text service? I have comcast cable with netgear router. The phone is setup to access internet via wi-fi. I am basically trying to find a way to boost my ATT signal strength using my wi-fi router for voice/text via my att phone number.
AT&T offers a femtocell called the MicroCell which is a VoIP device that uses your internet connection to make cell phone calls when the in-home signal is weak or non-existent. However, it currently only works with active post paid accounts. There are signal boosters available but they just attenuate the macrocell (tower) signal but do work well for some.
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If using your AT&T number is necessary, Otto Pylot's suggestion is the way to go.
If you can use a different phone number, you can get a Google Voice phone number and get the GrooVe IP app to make calls over Wi-fi. You can link your AT&T number to your Google Voice number so that even if someone calls your Google Voice number while you are away from your Wi-fi network (and in cellular range), you can still receive their calls.