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What is diffrent from cdma & gsm &umts

Deffination gsm&umts&cdma

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In GSM U can change to any service provider SIM Card..But IN CDMA U cant change..

Posted on Nov 29, 2008

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Can use my on moto g 16 gb on tracfone


Hello Garry!

To answer your inquiry, the compatibility will depend on the model that you have. Let me share with you the bands that Moto G uses, please consider if you have a CDMA or a GSM version.

Global GSM Model:
GSM/GPRS/EDGE (850, 900, 1800, 1900 MHz)
UMTS/HSPA+ up to 21 Mbps (850, 900, 1900, 2100 MHz)

US GSM Model:
GSM/GPRS/EDGE (850, 900, 1800, 1900 MHz)
UMTS/HSPA+ up to 21 Mbps (850, 1700 (AWS), 1900 MHz)

CDMA Model:
CDMA/EVDO Rev A (850, 1900 MHz)

Also, I kindly recommend you to verify with Tacfone, if your device will be compatible with their network.

If you need further information about the specifications of your device, please follow up this link: http://bit.ly/MotoG-specs

Hope this information is helpful for you.
Best regards,

Liz
Motorola Support

Nov 13, 2014 | Motorola Mobility Moto G 16 GB Black...

1 Answer

Sir i have n73 mobile, i get the signals on dual mode , and gsm but i can't get signal on umts mode please tell me what is the problem with my mobile


junnyy43,
If you can find your way on your phone on the phone network settings (GSM or 2G/3G) you maybe able to change the setting to UMTS.

Please take note, on some phones, UMTS, 3G, 3.5G, HSDPA may all be the same.
Most often you can only select 2G or 3G, 3G may actually mean UMTS/HSDPA/3G/3.5G.

Just curious, may I know the reason why you want UMTS? Perhapd I understand what you want to do, so I can give a better recommendation.

Aug 21, 2011 | Nokia N73 Cellular Phone

1 Answer

My nokia e63 wont receive calls, what is wrong please?


Go to settings->phone->network and changed the network mode from "dual mode" to "gsm". the other option there is UMTS. and that did the trick. you can always change back to dual as i remember on one of my old Nokia the phone wasn't detecting network and i had to do the reverse (from GSM to UMTS) to get it all good.

some notes:

-Universal Mobile Telecommunications System (UMTS) is one of the third-generation (3G) mobile telecommunications technologies, which is also being developed into a 4G technology.

-Unlike EDGE (IMT Single-Carrier, based on GSM) and CDMA2000 (IMT Multi-Carrier), UMTS requires new base stations and new frequency allocations. However, it is closely related to GSM/EDGE as it borrows and builds upon concepts from GSM. Further, most UMTS handsets also support GSM, allowing seamless dual-mode operation

Jan 08, 2011 | Nokia E63 Cell Phone

1 Answer

I havin nokia e71 and its not showing my network lines ... i cant call n incoming is not also coming...


Only thing I can think of.. is that maybe the phone is set to use UMTS only and not GSM?

Try looking under:

Menu / Tools / Settings / Phone / Network

And see if the option for Network Mode is set to GSM or UMTS or Dual Mode.

If it is set on UMTS try changing it to GSM and see if it will then connect to the network. The Dual Mode option should allow it to switch between the two automatically. I prefer setting my phone to GSM as it will help save on battery power.

Jul 05, 2010 | Nokia E71 Smartphone

1 Answer

I am having N73 but the network is not comming what should i do


Only thing I can think of.. is that maybe the phone is set to use UMTS only and not GSM?

Try looking under:

Menu / Tools / Settings / Phone / Network

And see if the option for Network Mode is set to GSM or UMTS or Dual Mode.

If it is set on UMTS try changing it to GSM and see if it will then connect to the network. The Dual Mode option should allow it to switch between the two automatically. I prefer setting my phone to GSM as it will help save on battery power.

Jul 05, 2010 | Nokia N73 Cellular Phone

3 Answers

I'm trying to unlock my BB storm 9530,after I type "MEPPD" I enter "MEP2" or "MEPP2" but still I dont get any window to put the unlock code in,any ideas ?!


Before you start, you MUST have an Unauthorized Sim Card inserted. An unauthorized Sim Card is a Sim Card that is NOT belong to the provider of the phone. Example: If you have a Verizon phone, you need to insert a T-Mobile Sim Card inside the phone before turn it on. 1. Power on the phone.
2. Phone will said "MEP check failed. Do you want to enter MEP unlock code". Select Yes.
3. "Enter Network MEP code (# left)". Enter the unlock code.
4. Press Enter, you should see “Code Accepted”
5. You need to check Network Connection is set on GSM/UMTS. Menu>Manage Connection>Mobile Network Options and make sure it GSM/UMTS.
6. Once GSM/UMTS is selected. You can now ready to make phone call.
Notice: If the network not working after your phone is fully charged and unlocking process “Code Accepted”. You must change from Verizon CDMA network to GSM Global Network a few times, after change from Verizon CDMA to GSM Global 3 times is completed, leaves it on GSM Global Network. Now it should work. (Verizon 8830 World Edition DOES NOT work in USA)

Mar 29, 2010 | RIM BlackBerry Storm 9530 Smartphone

2 Answers

My Blckberry Storm recognizes my sim card but does not make nor receive calls.


Your blackberry storm or Javelin, set the phone to CDMA by default instead of GSM, this usally happens when you buy the phone brand new. So just go to Manage connections>Mobile network options> Network technology and select GSM/UMTS. This happened to me before and i solved the problem after a week having this issue. This also happens when you restore or something like that!
Hope this can help!

Best Regards,
Julio de la Cruz

Jan 27, 2009 | RIM BlackBerry Storm 9530 Smartphone

4 Answers

Hi folks, I have a couple of small questions--and a big one. 1) What are the operating frequencies for Korean cellular providers, especially SK Telecom? 2) Are these monsters WCDMA, UMTS, HSDPA, 3G...


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Jun 27, 2008 | Cell Phones

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