Service provider's incompatible!

TMO service is spotty. I only get E where I live. There is no problem using a TMO sim in an ATT iPad.

I travel a lot and have great results with ATT .

Best bet is to find out who has good signal in the locations where you will use it. All carriers have some holes in their coverage. It is just a matter of finding what works for you.. All signal strength and speed being equal you would buy the cheapest but cheap is worthless if the carrier has poor coverage where you need it.

ugcop said:

Best bet is to find out who has good signal in the locations where you will use it. All carriers have some holes in their coverage. It is just a matter of finding what works for you.. All signal strength and speed being equal you would buy the cheapest but cheap is worthless if the carrier has poor coverage where you need it.

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This is the correct way to pick a cellular carrier.

I'm astounded that many people don't get this very simple concept and go online to ask "which carrier should I use?"

We don't know.

You have to figure out yourself which carrier works best in the places you frequent the most.

Venelin said:

I bought 30$ prepaid plan and I think there is some issue with activation of this service in Puerto Rico?

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You're not trying to use a phone plan in an ipad are you? That's unlikely to work out well regardless of carrier.