There are many telephone service providers all over the world. Each of them provide services based on what is needed in the locale that they operate and according to what their customers request from time to time. Some places have more than one while other areas have a monopoly provider. In Jamaica, for example, at one time there was only Cable and Wireless (formerly Telecommunications of Jamaica (TOJ)). Now there are Digicel and Oceanic Digital as competitors, with Digicel being the main rival of C&WJ. In America, there are Virgin Mobile, AT&T, Verizon Wireless, T-Mobile, and so on. England has Orange and others.
Now, every provider has their high points. The services offered by any provider is based upon how their customers are connected to each other, the type of communications system that they use. It could be CDMA, TDMA, or GSM. You will have to rate your own service provider as you see fit. It would not be fair to say exclusively that any one in a particular area is better than the other seeing that the services they provide are similar yet still diverse in some way. Comparisons can be made if they provide the same type of telecommunications service, which ultimately allows a much fairer comparison. In any case, let me know what you think about your telephone service provider. I am sure the comments will be quite interesting.