Sierra Wireless connection issues


I have a Sierra Wireless brand sim card which came with the MangOH red, apparently, it is registered to Verizon Wireless LTE when I tried to connect I cant. The following message comes up.

cm radio
Power: ON
Current Network Operator: Verizon
Current RAT: LTE network (LE_MRC_RAT_LTE)
Status: Registration was denied, usually because of invalid access credentials (LE_MRC_REG_DENIED)
Signal: Weak signal strength (2)
PS: Packet Switched Not registered (LE_MRC_REG_NONE)

I tried changing the APN to whar verizon shows in one website although I think is incorrect, can anyone tell me the correct apn for verizon or is anyone going through the same problem , thank you module is wp7601


Please check the apn. Some operators might have multiple apns.


Update: I do not know how but when I changed from the apn to the verizon one (vzwinternet) and waited for maybe 30 minutes it changed networks and began roaming then i changed it back to sierra wireless apn and began working just fine.