RAZOR PHONE STOPPED WORKING

Switching phones should be as easy as just moving the SIM card from one phone to the other.
There are a couple of factors however. If your current plan is through Verizon wireless, then your new phone must be another phone from Verizon or an Unlocked Phone.
If the new phone is locked to another carrier like AT&T or Bell etc then it will not work.
To switch the SIM card, power off both phones, locate the SIM Card. if it is an apple phone, there is a small door that you need to open with a pin or paper clip.
Other phones may need you to remove the back cover.
Next check to see that the receiver slot on both phones is the same size. If you have a larger SIM card and the new phone needs a smaller one, I would suggest you take it to Verizon.
If you have a smaller SIM and the new phone needs the larger size, you can buy a caddy at places like best buy, Staples or even a smaller phone shop.
Once you move the SIM card over, power up the new phone and it should work fine.
The SIM (Subscriber Information Module) carries the information about your phone number, plan etc.

Yes you need a new SIM, call your service provider for that. You can also visit one of their retail outlets to get the needed SIM card.

It's not possible as the two networks are not compatible with each other for the V3xx. With other phones it may be as easy as swapping SIM cards.

Motorola Support

See response here: Need to unlock Motorola Razor V3xx cingular to work on Verizon

Mark
Motorola Support

Net10 is a GSM company, which means that the phones that use must have a SIM card. Verizon, on the other hand, is a CDMA wireless carrier, which mean that there is no need for a SIM card in order to work. Verizon and Sprint are starting now to use mini-SIM for some of their CDMA phones or Google phones, (early stages).
Your best option now is to visit a Net10 retailer and asks them this very same question. But I seriously doubt that you can get it to work with Net10.
Net10 use the signals from AT&T, T-Mobile, (Sprint and Verizon when roaming).

take it to a place like metro pcs they can unlock the phone if you don't like their plans roll with it for a month then switch their plans a fairly cheep

the sim card is located near the battery. you might have to remove the battery.

if the phone is a Sprint or Verizon branded phone, there is no sim card

If the handset isn't locked to those three networks i.e. Tmobile, ATT and Alltel, then any sim card will work. Almost all handsets are locked to certain networks and so we can't use sim cards of other networks. You can verify this in only one way. If you have a sim card of another network (in your hand at the moment or you can borrow it from your friend or from other family members), you can insert the sim card, suppose a Verizon sim card, not those three. If the verizon works, then all sim cards should work on your handset.

Since your phone already works with Tmovile, ATT and Alltel, I hope all other network sim cards should work without any problem. Suppose if a phone is locked to network means, it's locked by the Service Operator to preserve their customers so that the customers will return to them if anything happens with the sim card or with the phone, this is a business plan logically designed.

For now, I can't confirm you, but at least if you could try with another sim card of another network (verizon) and it works, the no doubt, all sim cards should definitely work. But if you can't try it that way, I wouldn't recommend you, until you get it tested.
And that Advertisements seems a kind of something, "....unlimited everything...." sounds good, but must be unlimited Incoming Call and could also be without monthly rental fees. I don't recommend unless you ask about it to someone who already used the same sim card ($50). As we know, advertisement is advertisement.

If you need further help, let me know.

Good luck.

Thanks for using FixYa.

no you cannot because the at&t phone are gsm and boost is IDEN so its different

theyre right. it wont work for Verizon to use the full features on the sidekick. because, verizon and sidekick plan are totally different from each other. and only thing it will works for you that you can use the sidekick are sms(text) and to make a phone calls with a verizon sim card in and that pretty much it. 
and also, because a sidekick is restricted to tmobile. of course, but only things differently about it is the sidekick plan is only will works great for a sidekick itself that will definitely benefit you better to have/use the full features such as email, mms, notes, and etc. 

i mean, are you trying to use a sidekick with your verzion sim card in it or what? if so, then pretty much just like i stated right above.
sorry. :[