You said "chatr is 3g voice"
That is not true. Officially, chatr phones are 2g voice phones... look at their website, none of them has 3g. So it is a service designed to operate on 2g GSM phones.
However, some people have success to use their SIM card on 3g network, they do so at their own decision. It is not prohibited or supported. So if you have trouble connecting to a 3g network, like using your iPhone, they will not care. Because iPhone (3G) is not even sold on chatr... so don't expect them to help you troubleshoot dropped calls on your 3G phones.
This is clearly outlined in their website, under FAQ, General Info.
http://www.chatrwireless.com/web/con...neral_info_faq
"It’s important to note that the non-chatr phones must be GSM with 850/1900 mHZ frequency and unlocked."
So there, phones "must be" GSM, ie 2G.
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