Putting smartphone sim card into iphone 4?

I have an LG eclypse right now (talk and text plan) and its dying.
if i buy an iphone 4 that is locked to my current carrier (virgin mobile), will the SIM card work in the iphone, without me having to buy a data plan?
my sim card is standard sized but apparently you can just cut the extra plastic off around the sides and itll work in the iphone.

If the iphone is locked to the same carrier that your on at the moment then it should work if you cut the edges of the sim card off.

  • Will my iphone work with just putting in a SIM card? My old phone was turning off all the time and my mom had an old iphone 3 that she doesn't use anymore. I took her iphone and put my SIM card into it. I then plugged it into the computer and registered it with itunes. Will this charge my AT&T bill? I don't want to pay for data yet? I didn't activate it through AT&T, but now I'm kind of worried it will. Will the phone work okay without calling AT&T to activate it?
  • What happens if I put the SIM card of a non smartphone into and iPhone? I use AT&T and I have an HTC but it isn't a smart phone. So if I cut the SIM card into a nano SIM card, which is used for iPhones, and put it in an iPhone 4S, will the phone work? Also I do not use data on my phone, only texting and calling and I'm not telling the AT&T people because they would make me get an iPhone which I can't do until my contract ends next year or ill have to pay 300 dollars.
  • Unlocking iPhone by putting sim card in? My current network are unlocking my iPhone and they have sent me a message to say that to complete the unlocking please, restore from iTunes or put in a different sim card. If I use the sim card option, will it unlock the iPhone completely, or will it unlock it to the first sim card network I use in the phone? Because I may want to move network. Cheers
  • Putting my sim card in used iPhone? So my mom has an iPhone 4s, and she is going to upgrade to a 5 tomorrow. I want her 4s. Can I take my sim card out of my 4g android phone and put it into the 4s? I have a data plan and everything, and we both have verizon. Will this work like I won't have to set anything up with Verizon? My cousin did this and explained it to me but i just want to make sure I have this right?