
Originally Posted by
Circuits
Unless you gonna VOIP it straight up, you still need a carrier, a plan and a SIM. Verizon system compat gives you CDMA options, but only multimode phones will carry over to GSM-based SIM like ATT/T-Mobile/Europe.
If you're happy with verizon, buy a multimode unlocked or CDMA unlocked, or verizon phone. Bitch is usually the data plan to fully utilize the phone on carrier. You can use a jailbroken iPhone on ATT/T-Mobile network no problem, but unless they authorize you a data plan, it's a phone, and your data needs are served only off wifi. I used to use a jailbroken/unlocked iPhone 3Gs on T-Mobile pay-as-you go for my primary phone, but they only supported day-by-day Gen2 (EDGE/GPRS) data service to it, for an extra charge, and turned that option off over a year ago on me.
Data is the achilles heel of a smartphone to a carrier, unless you have ubiquitous wifi throughout your service area(s).