Metal siding definetly interferes with cell phone reception vinyl is
a better choice

Honestly your better off with siding, your existing wood probably has
lead based paint Repaining is a never ending job, and when it comes
time to sell low maintence is a advantage.

unless your home is in a historic district!...............

Expect siding to cost about 4 times the cost of repainting.

figure painting abut every 7 years to keep house looking good. every 10
is pushing it. the longer between repaints the more the wood repair.
that adds costs too.