Re: Cricket SIM card and iPad 4
The iPad should take any carrier's SIM card, the question is does the Verizon iPad 4 have Cricket's necessary radio's in it. I do believe Cricket is GSM and Verizon being CDMA/LTE you may not have what you need. This article may help youhttp://appleinsider.com/articles/12/04/13/inside_the_new_ipads_4g_lte_mobile_data_att_vs_verizon it is from when the iPad 4 came out and ran down some of the radio's and differences on the carriers.
I hope this helps.