Mobile phones are always considered as a good friend to man from the day it was unveiled. In the past several years, we have witnessed a technological boom in the field of telecommunication and as a result you can see a variety of mobile phones today coming with features that you cannot even possibly imagine. Apparently, smart phones which are considered as the future word for mobile phones are ruling the market of mobile phones today. In addition to the technological advancements in the present day phones, the respective service providers also assist the usage of such phones by providing offers like straight talk promo codes. Such coupon codes can be used to gain discount on a variety of related aspects like extra talk time, web surfing, etc. One of the recent features that won the heart of many is the siri technology unveiled by a renowned mobile company. Today, you have advanced cameras tucked into each of the mobiles introduced. Such cameras can be even used to click panorama pictures. Most of the current day mobile support Wi-Fi. Considering these facts, one can say rightly that mobile phones are no longer just a handset that is used to attend and make calls. These devices can be even considered as a gadget can serve the needs of PDAs, laptops, digital camera, etc.