850/1900, 1900 as back up band?

Discussion in 'OT Technology' started by silversilvia, Aug 1, 2005.

  1. silversilvia

    silversilvia OT Supporter

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    i want a v80, which works on 900/1800/1900 band. the local cingular uses 850/1900. and i can't use t-mobile in my area because i want free mobile to mobile from cingular to talk to my GF free.

    so anyways will this phone work well? the guy (sales rep) said 1900 is the "back up" band, and it will kinda work but not really. i always thoght that 850/1900 means it operates on both bands. can someone explain this to me? will the phone only work in the city and not in rural areas? i am doubting this guy because i kinda know him and he is sometimes full of shit, and i know some other people from other states have these phones which work well.
     
  2. coachrapture

    coachrapture New Member

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    Depends on your area. In the bay area of california, most cingular users are exclusively 1900 mhz and the 850 is what use to be the at&t network. Best place to find out is at howardforums.com or phonescoop.com forums.
     
  3. kungfuwoo

    kungfuwoo New Member

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    Most of cingular's network is predominately 850mhz. A lot of areas have very weak or no 1900mhz coverage. you need a phone that supports 850mhz, so you might as well get a quadband phone.
     
  4. BlackWRX02

    BlackWRX02 OTs Cingular Guru

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    Its not that its a "backup" band. The phone looks primarily for 850 as its whats most commonly used by Cingular is 90% of the network.

    Here in Daytona if you have a 1900 mhz phone, most of the time you'll be on t-mobile roaming. Just need to check your area with all the GSM providers, if someone has coverage there you should be OK for the most part. Also, depending on your phone you can manually select which part of the network you want to use. If you don't set it up that way you may notice shorter battery life as the phone may struggle to hang onto a signal or kill itself searching for some signal.
     
  5. vhx1

    vhx1 shit thunder crap lightning

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    alot of misinformation on here
     
  6. vhx1

    vhx1 shit thunder crap lightning

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    All GSM phones run on one or more of the following frequencies:
    800/850 MHz, 900 MHz, 1800 MHz, 1900 MHz.

    Whenever you see 800 MHz OR 850 MHz, they are referring to the SAME frequency range. 850 MHz is more accurate, and has become more commonly used when discussing GSM frequencies. In North America, GSM is run on 850 MHz and 1900 MHz. In Europe, Asia, Australia, and other countries abroad, GSM is run on 900 MHz and 1800 MHz.

    Many customers want GSM phones from abroad, or from EBay, to use with Cingular, and attempt to use a phone with incorrect bands. A 900/1800 MHz phone will NOT work in the USA. When looking at a GSM phone to use in the US, you need to look at which of the North American bands the phone uses. In other words, does it use the 850 MHz band? does it use the 1900 MHz band?

    Cingular runs GSM on 1900 MHz in some markets, 850 MHz in others, and has a dual band 850/1900 MHz network in others. To find out what frequencies are used in your market, check www.wirelessadvisor.com.

    If your area is one where Cingular is strictly 1900 MHz, such as CA, NV, NYC, NC, and others, you will have no issues using a GSM phone with just 1900 MHz. If your area is strictly 850 MHz, such as MA, a GSM phone with 850 MHz is required. In dual band markets, a phone including 850 MHz may be required, or may not be. This depends on whether the Control Channels are running on 850 MHz. The control channels keep you connected to Cingular while not using your phone. Cingular has been switching Control Channels over to 850 MHz in dual band markets as of late. This means a 1900 MHz phone will get No Service, as it can not access the 850 MHz Control Channel, even though Cingular is running service at 1900 MHz!!

    However, even if the control channels are running on 1900MHz, in a dual band market, a phone with the 850 MHz band will give you much greater reception, as you are able to utilize all Cingular towers. The 850 MHz signal travels further than a 1900 MHz signal, therefore even if all the 850 MHz towers include 1900 MHz, the 850 MHz signal will reach further, and penetrate deeper into buildings.

    There are exceptions of course to everything. Such as Cingular offering free roaming on other carrier's 1900MHz signals in a Cingular 850MHz market. Boston is a good example. It is a pure 850MHz market, yet has free roaming on TMobile and AT&T both running 1900 MHz GSM. However, you should beware that Cingular can turn this roaming off at any point in time, and it only stretches to the outskirts of the city (in the Boston example). So your 1900 MHz only phone will work in Boston, but then go dead once outside the metro area. Cingular also has the right to cancel your contract if you are roaming more than 50% of your minutes for 3 consecutive months. Rumor has it they also have the ability to block you from using a 1900 MHz only phone in an 850 MHz market based on the IMEI of the phone, which allows them to know if you're using a 1900 MHz only phone.

    With the impending buyout of AT&T, Cingular will have 1900 MHz in almost every market. At the same time, they will have 850 MHz in almost every market. Therefore using a phone with only 1900 MHz will really drop your level of service.

    When looking to use a GSM phone on Cingular's network, you should first check the bands used by the phone. www.phonescoop.com is an excellent resource for this. If the phone is not on the site, chances are very good it does not work in North America at ALL. If it is, Phone Scoop lists the frequencies used. You can always double check at the manufacturer's web site. More and more GSM phones are coming out with the 850 MHz band included. Quad Band phones are even appearing, such as the Motorola V600.

    Note: Although Cingular's newest policy is to sell only 850/1900 MHz phones, there are many phones in use on their network which are 1900 MHz only. This is due to areas such as California, where they have always had a GSM 1900 MHz network, before GSM was ever being broadcasted on 850 MHz. To accomodate such users, their IRDB is set up to allow them more ability to roam on 1900 MHz networks around the country, than SIM cards from other markets.

    The only main issue other than frequencies with using your own GSM phone, is whether the phone is "locked" or not. Many carrier's "lock" their phones to be able to use only their own SIM cards. So an AT&T GSM phone can only work with AT&T SIM cards. Putting a Cingular SIM card in it will give an error. An "unlocked" phone will work with ANY sim card. Therefore to use a GSM phone on Cingular, the phone must be locked to Cingular, or be unlocked. It is possible to buy a locked phone and have it unlocked. However, the simplest thing would be to buy an unlocked phone, or one already locked to Cingular.

    *from howardforums.com <- this is good site to go
     
  7. vhx1

    vhx1 shit thunder crap lightning

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    Update: Cingular uses BOTH 850 and 1900 in most areas in the US. There is no more issues with areas being 850 only. Cingular has 1900Mhz in ALL areas but 850Mhz is in most areas because some are 1900Mhz only. In those areas where they have 850, they also have 1900Mhz.
     
  8. kungfuwoo

    kungfuwoo New Member

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    :ugh:
     

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