“live in the US and Europe have for 10 y several Blackberry with unlimited worldwide data plan that is "grandfathered " that I am using only for DATA and SMSt will I be able to still use my At &T data plan on this phone + one other SIM for phone worldwide”
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Yes you will
Sorry, there was a problem. Please try again later.yes this will work with old plans as I have a 5 year old att family plan that is 30GB and still beats the unlimited plan by $30. This phone takes the new mini sim cards, the slot on the side of the phone takes two sim cards as there are 2 IMEI numbers associated with the Mate 9. A push pin tool is supplied to remove the carrier but a simple push pin will also work. Sim 1 sits alone and Sim2 sits under the memory card, both are in the same slot. I'm using a Sandisk 128GB microSD with no issues.Takes a steady hand and a couple tries to not shake the sim/memory cards while sliding the carrier back into the phone.
Sorry, there was a problem. Please try again later.Yes. The Huawei Mate 9 is GSM-ready and will work with AT&T's carrier. Just insert the SIM and you are all set. Note: Sometimes you may have to modify the SIM card, which you can do at your local AT&T store. (NS)
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