Sprint iphone 4s

tito2020

macrumors 6502a
Original poster
Oct 16, 2011
845
285
Took my sim out of my phone phone still works strange what does the sim really do then?
 

Coldsnow

macrumors regular
Apr 4, 2012
172
0
Took my sim out of my phone phone still works strange what does the sim really do then?
SIM stands for Subscriber Identity Module. It holds info about you and your provider, you need it to activate the phone but obviously the phone will still work, it's basically an iPod if you take out the SIM.
 

tito2020

macrumors 6502a
Original poster
Oct 16, 2011
845
285
Well I have a sim card on my 4s I removed it and still get service.

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yeah it runs only on cdma.. i wonder why it has one.
the 5 needs one for LTE.

my verizon 5 works without the sim, just wont work on LTE.
I recently followed how to open sim tray and I found one in there.
 

tito2020

macrumors 6502a
Original poster
Oct 16, 2011
845
285
Looked it up from what I read 4s is a world phone and the sprint sim card provided can be activated for international plans.
 

boomhower

macrumors 68000
Oct 21, 2011
1,560
50
yeah it runs only on cdma.. i wonder why it has one.
the 5 needs one for LTE.

my verizon 5 works without the sim, just wont work on LTE.
So it will work overseas. You can unlock it to run overseas which is primarily GSM which requires a SIM card.

The 5 has it for LTE. All carriers using LTE also use SIM cards now.
 

BFizzzle

macrumors 68020
May 31, 2010
2,443
0
Austin TX
So it will work overseas. You can unlock it to run overseas which is primarily GSM which requires a SIM card.

The 5 has it for LTE. All carriers using LTE also use SIM cards now.
Not asking why it has a sim slot... Asking why sprint has a sim for the iPhone 4/4s.
 

boomhower

macrumors 68000
Oct 21, 2011
1,560
50

dw3bb10

macrumors 6502
Nov 1, 2008
279
5
Sprint uses EVDO/CMDA for voice and data, Yes. BUT, LTE is a GSM technology, thats why it uses a sim card.

Some Sprint phones, such as the HTC EVO 4G LTE, have an embedded sim card. They are not International Phones so no need for a slot because you can only use them on Sprint. The iPhone 5 on the other hand, is.
 

SporkLover

macrumors 6502
Nov 8, 2011
498
1
You don't need the sim in the US for Sprint or VZW. If you want to roam overseas with your US number then you need the sim. Me, I just use alocal pre paid I'm when overseas.
 

tito2020

macrumors 6502a
Original poster
Oct 16, 2011
845
285
So is there a chance i can use a usa sim card like tmobile ? thanks
 
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