They are not picking it up vs There are not picking calls

Some examples from the web:

• Sensors are not picking up any ships coming from the surface.
• Our guys in front of the house are not picking up.
• And I'm not picking it up.
• And I'm not picking it up.
• Picking it up on long-range sensors.
• Courier's picking it up this afternoon.
• I can't risk somebody else picking it up.
• I have no intention of picking it up.
• Thank you for picking it up.
• No, someone else will be picking it up.
• It's amazing you're picking it up so quickly.
• A messenger's picking it up at 11:00.
• His wife's picking it up in the morning.
• Everybody's picking it up, sarge taxis, police cars, fire engines.
• Thank you so much for picking it up.
• Picking it up on one, two, three police cameras.
• They will contact her tomorrow about picking it up.
• I'm not picking up any power source.
• I'm not picking up their shuttle on sensors.
• I'm not picking up Harry's com signal.

Some examples from the web:

• Killing someone because he's not picking up my phone calls is a bit exaggerated.
• You're not picking up when I call you.
• Seriously, you could be picking up calls on a banana.
• Sensors are not picking up any ships coming from the surface.
• We're picking up a distress call, Captain.
• Our guys in front of the house are not picking up.
• We're picking up a distress call from the Amargosa Observatory, sir.
• Some night when it was raining outside... and both the boys had colds and my husband was on a call... picking up a body.
• Commander, I am picking up a distress call on one of the upper subspace bands. What's the source?
• We have plainclothes searching the radius, boss, we have cellphone interceptors picking up all nearby calls, and we have agents on the roofs, scanning the crowd.
• Anyway, Abbi's not picking up any of her calls, so I'm pretty sure she's dead.
• I'm trying to call Elliot, and he's not picking up.
• B-But I've tried to call him for the last two hours and he's not picking up.
• He's not picking up, returning my calls.
• I'm not picking up any power source.
• I'm not picking up their shuttle on sensors.
• I'm not picking up Harry's com signal.
• I'm not picking up any life signs, Captain.
• I'm not picking up any active energy no life signs.
• I'm not picking up anything like any life signs.