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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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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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THIS IS THE MOBILE I SURELY THINK WILL HELP U. THANK YOU!!! please rate the solution.

Jun 27, 2008 | Cell Phones

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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

My blackberry says no signal


Remove your device battery, insert the appropriate SIM card and then restart your handheld. Next, open up your Manage Connections options again. Select Mobile Network Options and then change the Network Technology from 1XEV to GSM/UMTS. (Remember, if you want to go back to CDMA, you need to switch back the network technology option.)

Apr 12, 2013 | Computers & Internet

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

Okay so i amtrying to use an unlocked att tilt 2


not possible

ATT is GSM/UMTS Boost is IDEN/CDMA

Apr 11, 2010 | AT&T Tilt Smartphone

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

Umts with nokia 6630


My Phone Have Some Problam.
Phone Used 2 Antennas For GSM & UMTS
I am detach Gsm Antenna (It Has 2 Terminals )
I Remove That Terminal and Now Phone Reciving UMTS Only

SRI LANKEN IDEA

Jan 08, 2009 | Nokia 6630 Handheld

1 Answer

Verizon?


Hello,

The carriers who use non sim phones for their network are most likely to use a CDMA 450Mhz Network. Most phones with a sim slot will work on GSM 900-1800-1900 Mhz bands, with their subdivisions (like 850-950 domain, 1800-1850). A phone with a sim card uses a RF module tuned on a specific range of frequencies. The major ones are GSM, CDMA and UMTS (HSDPA included). There are phones with support for GSM + UMTS - most 3g phones available on marked. In your case, a GSM HTC touch Dual will work on gsm networks. For verizon or other cdma networks, HTC produces a CDMA version of the Touch Dual. If you have the gsm version (the one that needs a sim) you should use it on gsm carriers.

Hope this helps.

Jun 19, 2008 | HTC Touch Dual Slider Smartphone

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