i recently bought a new huabo a718 international unlocked phone with dual band and gsm but when i put my at &t sim card in it the card registers but the phone says i have no service. when i looked closer at the product description it says it runs on a 900/1800 mhz does anybody know if at&t does not use these mhz and if not is there anything i can do
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McGirk Posts: 2411
Phone Model: AX380 Wave
Service Provider: Alltel
Fri May 23, 2008 8:54 am
The trick is, while the phone can say it is international, the United States does not use the 900/1800 frequency, we use the 800/1900 frequency. To have a phone that works here and the rest of the world, instead of a dualband phone, you would have need a quadband phone.
kraftyguy_00 Posts: 3
Fri May 23, 2008 12:49 pm
so there is nothing that i can do about it
McGirk Posts: 2411
Phone Model: AX380 Wave
Service Provider: Alltel
Tue May 27, 2008 9:25 am
Not really.
kraftyguy_00 Posts: 3
Tue May 27, 2008 6:31 pm
ok thanx also the company is sending me a new phone but i think it is a tri band would the service be as good with just a 1900mhz phone as with a 850/1900 mhz phone
madison101 Posts: 668
Wed May 28, 2008 9:36 am
As previously stated, you will need a quad band phone that will work on all 4 frequencies. We still use the 800/1900 frequency in the states and canada. If you are in an area that has the 1900 frequency you should be alright. I would just explain to your company that you need a quad band phone.
McGirk Posts: 2411
Phone Model: AX380 Wave
Service Provider: Alltel
Fri May 30, 2008 9:28 am
1900mhz will work fine in larger markets, but in rural areas the 800 mhz is a must have. If you do not plan on leaving the airport you should be okay, but visiting uncle bobo in the sticks will leave you without a working cell phone.
Rich _J Posts: 1
Sun Jul 27, 2008 5:55 pm
To be correct, the USA GSM bands are GSM 850 and GSM 1900. 800 Mhz band is used for AMPS (Declining) , CDMA, TDMA (declining) and Iden (No comment). International CDMA/GSM phones are built on the presumption that CDMA will be used in markets where it is present, though in China, Mexico, Brazil etc you have a choice but CDMA roaming is cheaper and CDMA signal tends to be more prevalent in rural areas, as GSM 850 service is with AT&T.
madison101 Posts: 668
Mon Jul 28, 2008 9:04 pm
There are 4 frequencies that cell phones use.If you have a dual band phone and there are no frequencies for you to use then the phone won't work! TDMA is obsolete, no longer exists in canada or the states, as far as AT&T and Rogers is concerned. GET A QUAD BAND PHONE! clear nuff?
