June 16, 2015
August 6, 2015
January 18, 2009
You cannot use the 2nd sim for data I now understand but some examples. A work number and a home number. A Speakout account and my t-mobile account so no switching when crossing the border. Along with that when I visit Manitoba and go to an interlake area with family, Rogers/speakout is non-existent but (B)elus is and the T-mobile roaming uses (B)elus and I still have a phone at that casino.
Of course this is possible due to the Acer being unlocked.
Just got back from a little loop...in BC.Speakout...in Western Washington.T-mobile....in Eastern Washington remote area roaming on ATT......back to BC
T-mobile prepaid $10US to keep active for a year and Ebay sometime deals of $95 air time for $30.
April 22, 2009
The Acer Z220 is a world phone, not specifically designed for the North American market, but still supports most of the 3G and GSM frequencies that are required for most North American carriers.
The dual SIM feature is much more popular in the rest of the world, where there is so much competition, that you need more than one SIM card to take advantage of rates in specific regions.
In Canada, dual SIM is a bit less useful, because there is mostly a 3G network, with Rogers and it's flankers supporting 2G, but not for long.
One use you could get is have a tablet plan SIM for data, and a voice plan SIM for voice on the 2G. Surprisingly, that is usually cheaper than a plan with both voice and data.
Another option is if you are in the states often, you can use a tmobile or att SIM, which allows you to use one phone for both countries.
August 15, 2010
To me, a "dual SIM card" (as opposed to a "dual SIM phone") is a card with perforations for both regular (technically mini) SIM and micro SIM. It's not that long ago that the carriers had 2 different cards to manage in their inventory.
nano SIMs are technically thinner though people (including me) punch them out of a regular SIM and it seems to work.
Not sure if this is the context of the question, a dual-SIM phone would have two SIM cards in it (to use that feature) I think.