Check to see if your preferred network is set to LTE/CDMA (not Global).
Turn Airplane Mode on, then off for another way to reconnect.
You can always try a new SIM card (they are free at a corporate Verizon store, and customer service can also mail you one if a store is not close by.) SIM cards can go bad so a new one may solve the issue.
We want to make sure you are able to receive your 4G service again. What zipcode are you in when you are receiving the 1x service? Do you experience this type of data connection everywhere you go? When did this issue begin? Have you had a chance to provide the wonderful steps provided by SuzyQ to see if that helps?
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