CDMA Iphone 4S and UMTS/HSDPA/HSUPA?

Question

Level 1

0 points

CDMA Iphone 4S and UMTS/HSDPA/HSUPA?

Quick question, if I purchase an off contract Verizon iPhone 4S and get it SIM unlocked from verizon, does this phone support the UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz) bands? My understanding is that it does support the GSM/EDGE bands, but I'm a little unclear if it does the other ones or not.

My plan is to purchase it off contract and have the option of using it on Verizon or AT&T's 3G networks if needed. (Not at the same time)

Does the AT&T and Unlocked 4S only support the UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz) bands?

Thanks

Posted on Dec 21, 2011 10:08 AM

Reply

Answer 1

varjak paw

Level 10

170,206 points

Dec 21, 2011 10:12 AM in response to MrEricM

Verizon does not unlock iPhones, even when off contract. The SIM socket and GSM support are for international roaming only. If you want to use an iPhone with GSM carriers, you need to purchase an unlocked GSM version (AT&T doesn't unlock iPhones either).

The GSM frequencies and standards the iPhone 4S supports can be found in the tech specs:

http://www.apple.com/iphone/specs.html

Regards.

Reply

Answer 2

KiltedTim

Level 10

195,747 points

Dec 21, 2011 10:18 AM in response to MrEricM

No. Even if you use it with Verizon service and the agree to unlock the SIM slot, You can only use a GSM network when there is no CDMA network present at all. You can NEVER use it to connect to a U.S. GSM carrier.

Reply

Answer 3

MrEricM Author

Level 1

0 points

Dec 21, 2011 10:25 AM in response to MrEricM

Thanks for the responses. Verizon's policy is that they will unlock the SIM after 60 days of continued service for international travel, but it looks like it is strictly only for international travel. Thanks for confirming what I suspected.

Reply