Soldered RAM upgrade: technically possible, practically a bad idea.
Yes, a pro can replace soldered RAM, but it’s not the simple upgrade you’re hoping for.
Replacing soldered RAM isn’t like swapping a stick. It requires desoldering the existing chips and soldering new ones — a job for a specialist with a BGA rework station. That alone costs a few hundred bucks. Add the cost of the new chips, and you’re often paying more than the laptop is worth. And even then, there’s no guarantee the motherboard survives the procedure. One lifted pad and the whole machine is trash.
Most shops won’t touch it because the risk-reward ratio stinks. If you find someone who will, expect to pay $200–400 plus parts, and accept that you might end up with a brick. Your warranty is gone the second the iron touches the board.
If you’re shopping now, buy the RAM configuration you’ll need in three years. If you’re stuck with soldered RAM and need more memory, sell the laptop and buy one with more soldered or socketed RAM. This is not where you save money.
