The iPad A1430 model is one of two models with Wi-Fi + 4G. It uses 4G LTE service provided by AT&T and contract with the AT&T is required to keep access to their network. It will only work with AT&T 4G and you cannot switch iPad A1430 to Verizon network. You will need to purchase another iPad for that. This iPad model number is iPad A1403
AT&T provides the following data plans that are 4G LTE:
Warranty information as posted on the AT&T site: "Limited 4G LTE availability in select markets. Deployment ongoing. 4G LTE device and data plan required. Claim compares 4G LTE download speeds to industry average 3G download speeds. LTE is a trademark of ETSI." Source: http://www.att.com/ipad