If I go to .905, won't I start having 4G connectivity issues again ?
In theory, yes, because you'll have the .905 radios. Are you on .902 or .905 right now?
What you might do is:
1. Power phone down
2. Remove battery and sim card
3. Replace battery only and power up.
4. Let it power up completely (you'll get a "No sim card" error message) and then power down
5. Remove battery, replace sim card and battery
6. Power up
It should reacquaint your phone with the 4G in your area. Be sure to put the sim card in correctly, otherwise it'll fry the card (this happened to me). If that happens your local Verizon store should be able to replace the sim card at no charge.