CDMA and GSM

[dansod]

I'm thinking about switching to boss revolution mobile, but i would also like to keep my cricket service. Is there any phone that i can use for both at the same time, meaning i want boss revolution (Sprint network) and Cricket (ATT) on the same device. 

[Fred Castellum]

To do that you'll need a Dual Sim Phone.

[Tabs]

2 minutes ago, MyInnerFred said:

To do that you'll need a Dual Sim Phone.

CDMA doesn't use a sim card.

 

6 minutes ago, dansod said:

I'm thinking about switching to boss revolution mobile, but i would also like to keep my cricket service. Is there any phone that i can use for both at the same time, meaning i want boss revolution (Sprint network) and Cricket (ATT) on the same device. 

 

Unfortunately there are no devices that support both CDMA and GSM. They use fundamentally different radio architectures, and in markets where both CDMA and GSM services exist (mainly the USA), it is far more efficient for manufacturers to simply design two different versions of the same phone to support each type of radio. Otherwise, regardless of how the phone was being used, half of it's hardware would be completely unused.

 

As an aside, this is why dual-sim GSM networks work, since each individual sim still utilises the same hardware to connect to each network. You can't get a "dual CDMA" device because the hardware pairing is locked on first use.

[dansod]

That's interesting, this is from the carrier site.

"Depending on which Carrier network the phone was previously on you may need to purchase a new SIM card that is compatible with Boss Revolution. You can buy one in Boss Revolution Mobile Shop".

https://www.bossrevolutionmobile.com/en-us/help.html#compatible_phones

[Zodiark1593]

5 hours ago, Tabs said:

CDMA doesn't use a sim card.

 

 

Unfortunately there are no devices that support both CDMA and GSM. They use fundamentally different radio architectures, and in markets where both CDMA and GSM services exist (mainly the USA), it is far more efficient for manufacturers to simply design two different versions of the same phone to support each type of radio. Otherwise, regardless of how the phone was being used, half of it's hardware would be completely unused.

 

As an aside, this is why dual-sim GSM networks work, since each individual sim still utilises the same hardware to connect to each network. You can't get a "dual CDMA" device because the hardware pairing is locked on first use.

Well, my sister's Verizon Galaxy S7 can use either CDMA or GSM. I know this because I helped to set the thing up on T-Mobile and made sure it made calls on 2g/3g.

 

As for a phone that can do both simultaneously, I've no idea.