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DRNewcomb · 09-06-2012, 04:24

First thing, "tri-band" can mean many things. It can be 850, 1800, 1900 or it could be 900, 1800, 1900. You want to make sure that your phone has 900 & 1800 for use in China. In this day and age it costs no more to get a quad-band which works on both US GSM bands and both China GSM bands.

You need to make sure that your phone is unlocked so that you can use any SIM. Right now, all GSM phones except the iPhone4S use a standard sized SIM. Some of the iPhones use a micro-SIM. Calling to the US is a function of your calling plan & carrier, not the band. If it works, it works. You can place and receive calls too and from any place your plan is authorized to call. In other words, if you are in China with a 900/1800 phone, you don't need to have US frequencies to call to the US.

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DRNewcomb (Offline) Senior Member Prepaid Professionist Posts: 1,465 Join Date: 27 Feb 2004 Location: Mississippi, USA Country:	09-06-2012, 04:24 First thing, "tri-band" can mean many things. It can be 850, 1800, 1900 or it could be 900, 1800, 1900. You want to make sure that your phone has 900 & 1800 for use in China. In this day and age it costs no more to get a quad-band which works on both US GSM bands and both China GSM bands. You need to make sure that your phone is unlocked so that you can use any SIM. Right now, all GSM phones except the iPhone4S use a standard sized SIM. Some of the iPhones use a micro-SIM. Calling to the US is a function of your calling plan & carrier, not the band. If it works, it works. You can place and receive calls too and from any place your plan is authorized to call. In other words, if you are in China with a 900/1800 phone, you don't need to have US frequencies to call to the US.