Short answer is you cant block it, but they will not be able to see billing, upgrade, detailed usage, or beable to change any features if you set yourself up as the account manager. They will not be able to access that stuff, but they will be able to see their minutes, texting and data usage, which is fine i guess.I have four lines on my account, they are all droid x's. I wanted to know if there was any way of blocking the, my verizon app on all of them except for the primary line? I dont think my account info is anybody else's business but my own. :icon_eek: