CNET staff not advertisers, partners or business interests determine how we review products and services. If you buy through our links, we may earn a commission. If your family and friends are on Apple services like iMessage and FaceTime, stick with an iPhone. If you’ve been deep on Samsung, stay on Android. Know that switching between the two has never been easier. Phones are big in general with the smallest ones having a 6.1 inch screen and large models topping out at 6.8 inches. That...