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Unfortunately these altimeters are part of a very large critical infrastructure, which can't be ignored. Just saying they shouldn't be working that way doesn't negate the fact that they are working that way. Part of engineering is taking the real world into account, even if the real world is inconvenient for you.

>The altimeters with issues are not operating to their design specs.

Then what is the required passband attenuation at 220 MHz away from the centre frequency as per the spec? What altimeters are not meeting this spec?

I find it weird that people are claiming that the altimeters are defective here. That would be a big deal if true.

So your suggestion is we ground all flights for 6-12 months while they retrofit new altimeters so you can have your phone battery die faster?

Yes, that’s exactly what OP proposed. /s