I have a new Nokia Lumia 635 Windows Go Phone. I use Wi-Fi at home with the new Go Phone and this makes the data usuage quite small. I have the $25/month AT&T plan that is good for 1 GB of high speed data and unlimited data at a lower speed beyond the 1 GB usuage.
I used to have the 25 cents per minute plan on my old Z432 Go Phone, and my phone calls were quite expensive. I switched to the $25/ month plan and we are considering using the 10 cents/minute plan for the old Go Phone.
I hope this isn't too confusing. We're kind of new to all of this.
Mike
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