Application stores are a great place that offers reviews on not only phones but applications too. Another good place would be the website for brand names or networks.
CNET Review has conducted a review of smartphones. The reviews can be viewed at http://reviews.cnet.com/best-smartphones. They currently rate the Motorola Droid Razr Maxx as #1.
Reviews on most models of smartphones can be found on Amazon. Their customer reviews can be invaluable. Consumer Reports is also a reputable sources for equipment reviews.
Comparisons between smartphones may be found on reviews.cnet.com/ or www.pcmag.com, two popular websites featuring hundreds of reviews on any electronics.
If you mean an official website with reviews, try Amazon.com product reviews on the kinds of smartphones you are considering. There are tons of reviews by people who have bought or used the item.
Consumerreports.com provides reviews for the most recognized smartphones and cameraphones. Another website is pcworld.com, both of these websites provide reviews of several phones.
As far I have read all carriers can support the smartphones. You can search your present cell service and ask if they can support it or not. You can find reviews on Cnet website.
The best place to find reviews on such products as aerators is online. You can find reviews from the companies that make the aerators and you can find reviews on the aerators by people who actually use the products.
Reviews on different copiers can be found from sources such as PC Mag, Amazon, and Epinions. These websites provide professional reviews in addition to customer reviews.
Many different websites offer information and reviews about routers. About, PC Magazine, CNET Reviews, and Expert Reviews offer information and reviews about different routers.
The LG KF700 has received decent, but not spectacular, reviews from popular consumer reviews sources. Usually it receives 3-3.5 out of 5 in most reviews, as most consumers don't think it stacks up to the top smartphones on the market.
One of the best review sites is Cnet. You can find reviews for the Motorola ES400S at http://reviews.cnet.com/smartphones/motorola-es400s-sprint/4505-6452_7-34192032.html. You can also try http://www.gsmarena.com/motorola_es400-reviews-3409.php
My favorite place to read shoe reviews is Runner's World. They have such a variety of reviews you can find ones for so many different shoes. I find that their reviews are always spot on.