> Also weigh your electronic devices laptop/phone to check if the weight differs from its original weight, it should not deviate.

What kind of errors are acceptable here? Or maybe better, how accurate are the measurements given from the manufacturer?

I have a iPhone 12 Mini for example, Apple says (https://support.apple.com/en-us/111877) it should weigh 135 grams. Measuring with a scale of 0.01g precision (which is also calibrated right before) I get 133.5g, so it's ~1.5g off.

Measuring a 50g weight gives me exactly 50g, so the scale is correct, so either the weight of my phone is off, or Apple doesn't give exact weight.

I guess it is better to weigh it just after the purchase from a random store and from there the weight should never change.

Are you in hezbollah as well?

If so, I'd expect my phone to weigh too much rather than too little, because of the added explosives.

What if they replaced the battery with a physically smaller battery to make room for the explosives? If the explosives are less dense than the battery the rigged phone would weigh less than the original.

Where do they do this? Do they pick up the package at the post office distribution center?

In my case they did it at the store where I came to pick it up. That's how I got aware of it.

The espionage agency in question was the french DGSI.

What did they put inside?