Your employer should have a technology access policy in place for what you are allowed to do & are not allowed to do using company time & equipment.
Even while on lunch, the use of company equipment may be regulated to include or dissallow certain things.
Ask your supervisor/boss if there is any documentation in place.
If they won't let you do anything online, ask about personal listening devices & their accepted use on the job as well.
If all else fails, do what I did a while back if you can & upgrade your phone so you can have access to the internet while on break!
Whatever you decide to do to "keep your sanity" so to speak, make sure it does not interfere with what you are there to do - your job.
Good luck surviving cubicle life for however long of a time it may be.
I feel your pain in that regard!
