Cellphones usually have a SIM card. There are land lines that do not as well as Satellite phones also do not have SIM cards.
If you are with Sprint, there is no SIM card for the Samsung Conquer. Sprint does not use SIM cards.
Yes
Both the Samsung Galaxy S5 and Galaxy S3 have micro-SIM cards. So, it should work.
Yes, all sim cards conform to a standard size.
International cellphones or Global Satellite Mobile communication are those cellphones that come with a SIM card. These SIM cards are interchangeable. You can change the SIM card to any other provider's SIM card and you can use these phone anywhere in the world where there is a network coverage.
No it does not, that device is a CDMA device and only GSM devices use SIM cards.
Of course it will. The MicroSD (if the phone can accept one, not all do) has nothing to do with the operation of the phone, it is only for your personal use (e.g. storing photos). Perhaps you were thinking of a SIM card instead of a MicroSD card. Phones that use SIM cards (most cellphones do) cannot work at all without the SIM card, because it provides the Subscriber Information that associates the physical phone with your account in the phone provider's computers.
I don't believe so, at least the sph-910 doesn't.
Samsung phones that can support GSM 850/1900/ 3G 1700/2100 are the ones that will work in America. Also, make sure that the phone is already unlocked so you can just insert any American GSM SIM cards.
No, Cricket Wireless uses the CDMA (code division multiple access) technology. Cellphones that uses Sim Cards are running on GSM (Global System for Mobile Communication)
"Yes. All phones need a SIM card, or it will not function." Actually, that answer is incredibly wrong. SOME phones use SIM cards. Some phones don't. A phone on the Verizon, Alltel, or Sprint networks do not use SIM cards as they operate on CDMA platforms. iDEN (an ancient Nextel system) or the global standard GSM (AT&T) use SIM cards.