Phone7plus bad signal problem

One week ago,I bought my iPhone 7plus 256GB golden and picked it up in Apple Store.So exciting, isn't it? But later I found something bad with my new phone. Signal is always weak. Compare to any other cellphone that I have, my new iphone7 plus seems to be 30% reduction in signal at least. It really frustrated me. So I checked google for help but the searching results strike me again. Unfortunately my new iPhone with model A1784 used intel baseband chip MM7360 which is a new product from new supplier. It means all iphone7 and 7plus will be separated into two group which one is high performance, the other is low. Obviously you'll very likely get different quality iPhone under the same payment. So what am l supposed to do with my iPhone now? It's really hard to say "I love you" not only because of the price but ...