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No voice/data? Don't care. Those of us on Verizon are used to not having it, and I'm almost ALWAYS around Wifi that I can hop on if I need it.
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You can't miss what you never had.
However once you use it, you wonder how you ever did without it. Especially when you are in areas where free WiFi is not available.
There are no doubt currently more places where WiFi ain't free, than places where it is free. It's those places where it isn't free where this makes a difference.
Being able to check your email while you talk or comparison shop over the internet while you have a vendor on the line, or review the vendor's catalogue while you have him on the line is convenient.
If I'm on my laptop and my landline phone rings, I don't close my laptop and quit browsing the internet, or checking my email, etc. while I'm on the landline phone.
And if I'm on the web, using my iphone and a call comes through, I'd find it inconvenient to "close" my browser or email and stop what I was doing on the internet, using my iphone, until after my conversation was over.
I can talk and continue right on doing whatever I was doing on the web before I took the call, same as I would were I home using my laptop and my phone rang.
Of course, it goes without saying that much of your choice depends on if you are in areas where free WiFi connections are readily available, many of us are not, and on if your phone service is dependable. If I were getting poor phone service, I'd not stick with the carrier no matter who it was.