SMS (Short Messaging Service)

SMS or the Short Messaging Service allows users to send and receive personal text messages directly between mobile phones or sometimes to email adresses. Each message can be up to 160 characters long (when using the default character set) and can be sent to and from users of different operator networks. All mobile phones support SMS.
Recently mobile manufacturers have started offering special reading layouts for SMS inspired by Instant Messengers such as ICQ, Skype, and MSN. The so-called threaded message layout or conversation-style layout displays the incoming and outgoing messages between two participants in a single pane ordered chronologically.
This enhancement reflects the recently prevalent use of SMS as a type of instant messaging much like you would chat on a computer. When possible we try to explicitly state that a mobile phone supports this enhanced messaging view.

WAP

WAP (Wireless Application protocol)

WAP is an international standard for applications that use wireless communication. Its most common application is to enable access to the Internet from a mobile phone or a PDA.

WAP sites are websites written in or converted to WML (Wireless Markup Language) and accessed via the WAP browser

WAP websites are now considered outdated as most modern phones have web browsers with HTML support.

WAP

WAP (Wireless Application protocol)

WAP is an international standard for applications that use wireless communication. Its most common application is to enable access to the Internet from a mobile phone or a PDA.

WAP sites are websites written in or converted to WML (Wireless Markup Language) and accessed via the WAP browser

WAP websites are now considered outdated as most modern phones have web browsers with HTML support.

Edge-Networking

EDGE (also known as Enhanced GPRS or EGPRS) is a data system used on top of GSM networks. It provides nearly three times faster speeds than the outdated GPRS system. The theoretical maximum speed is 473 kbps for 8 timeslots but it is typically limited to 135 kbps in order to conserve spectrum resources. Both phone and network must support EDGE, otherwise the phone will revert automatically to GPRS.
EDGE meets the requirements for a 3G network but is usually classified as 2.75G.
Enhanced Data rates for GSM Evolution (EDGE) (also known as Enhanced GPRS (EGPRS), or IMT Single Carrier (IMT-SC), or Enhanced Data rates for Global Evolution) is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM. EDGE is considered a 3G radio technology and is part of ITU's 3G definition.^[1] EDGE was deployed on GSM networks beginning in 2003 — initially by Cingular (now AT&T) in the United States.^[2]
EDGE is standardized by 3GPP as part of the GSM family.
Through the introduction of sophisticated methods of coding and transmitting data, EDGE delivers higher bit-rates per radio channel, resulting in a threefold increase in capacity and performance compared with an ordinary GSM/GPRS connection.
EDGE can be used for any packet switched application, such as an Internet connection.
Evolved EDGE continues in Release 7 of the 3GPP standard providing reduced latency and more than doubled performance e.g. to complement High-Speed Packet Access (HSPA). Peak bit-rates of up to 1Mbit/s and typical bit-rates of 400kbit/s can be expected.