Samsung
no, they are not, only phones who have the android system. For example, apple doesn't have android but most of the htc and samsung phones have android.
There are many companies who manufacture cell phones. Some are: Motorola LG Nokia Samsung Kyocera Audiovox BlackBerry HTC UT Starcom
Some popular T-Mobile phones consists of: Samsung Galaxy S: Vibrant, Samsung Nexus S, Blackberry, G2, HTC, & many other phones.
The top 5 cell phones on the market is the Iphone 5 from Apple, Samsung Galaxy S4, Samsung Galaxy S3, Blackberry Z10 and the new HTC One, theses phones are sold across the globe.
Many modern cell phones have replaceable batteries. These include phones by Samsung, HTC, and other manufacturers. However, the newest phones, which strive for being thinner, have embedded batteries.
Recently Sprint has came out with the Sanyo innuendo, Lg Optimus G, and soon to come out with Samsung Galaxy s4, Blackberry Q10 and the HTC ONE. Sprint even has a unofficial hone that is soon to come out as well!!
Some of the best cell phones currently available are the Apple iPhone 4S, the HTC Sensation 4G, the Samsung Galaxy S II, and the Motorola Droid brand phones.
HTC seems to be the best by far. It's what I own. HTC, Samsung, Sony, Apple and LG are all good brands to get. I like the HTC, Apple and LG the best though.
The iPhone 4S is available through Sprint. Other phones currently available at Spring are the LG Marquee and the Samsung Conquer. The HTC Evo Shift and HTC Evo 3D are also phones that are available through Sprint.
Boost have a selection of Android phones from Samsung, HTC and LG. They also have Blackberry phones. If one visits the BoostMobile website all options can be checked out.
Boost Mobile offers a range of cell phones, these include: The Samsung Galaxy s3, Kyocera Hydro EDGE, LG Optimus F7, Samsung Galaxy Prevail 2, HTC One SV, and Boost Force.