Mobile phone charms (also cell phone charms, phone danglers, phone lanyards and phone straps) are charms that are connected to a mobile phone using a small strap, a band knotted with a Cow hitch knot, or lanyard.
 Many phones have a loop hole through which a strap can be attached.
 In Japan they are known as "keitai straps" (携帯ストラップ ) .
 Phone straps have now become a cultural phenomenon beyond their basic utilities, and they may be decorated or themed with famous characters such as animation heroes or "Hello Kitty".
 Phone straps may also have additions to add additional functions such as detecting ghosts, carrying medicine pills or mobile gardening.
Global System for Mobile Communications (GSM) services are a standard collection of applications and features available to mobile phone subscribers all over the world.
 The GSM standards are defined by the 3GPP collaboration and implemented in hardware and software by equipment manufacturers and mobile phone operators.
 The common standard makes it possible to use the same phones with different companies' services, or even roam into different countries.
 GSM is the world's most dominant mobile phone standard.
A prepay mobile phone (also commonly referred to as pay-as-you-go, pay-as-you-talk, pay and go, go-phone or prepaid) is a mobile phone for which credit is purchased in advance of service use.
 The purchased credit is used to pay for mobile phone services at the point the service is accessed or consumed.
 If there is no available credit, then access to the requested service is denied by the mobile phone network.
 Users are able to top up their credit at any time using a variety of payment mechanisms.
LG Electronics Inc. ("Lucky Goldstar") (Korean: LG전자 ) is a South Korean multinational electronics company headquartered in Yeouido-dong, Seoul, South Korea, and is part of the LG Group, employing 82,000 people working in 119 local subsidiaries worldwide.
 With 2014 global sales of USD 55.91 billion (KRW 59.04 trillion), LG comprises four business units: Home Entertainment, Mobile Communications, Home Appliance & Air Solution, and Vehicle Components, with Starion India as its main production vendor for refrigeration and washing machines in the Indian sub-continent.
 The CEO of LG Electronics is Bon-joon Koo, who assumed the role of vice chairman of LG Electronics on 1 October 2010.
Mobile phone overuse (Mobile-phone addiction or problem mobile phone use) is a dependence syndrome seen among certain mobile phone users.
 Some mobile phone users exhibit problematic behaviors related to substance use disorders.
 These behaviors can include preoccupation with mobile communication, excessive money or time spent on mobile phones, use of mobile phones in socially or physically inappropriate situations such as driving an automobile.
 Increased use can also lead to increased time on mobile communication, adverse effects on relationships, and anxiety if separated from a mobile phone or sufficient signal.
Mobile phone tracking is the ascertaining of the position or location of a mobile phone, whether stationary or moving.
 Localization may occur either via multilateration of radio signals between (several) cell towers of the network and the phone, or simply via GPS.
 To locate a mobile phone using multilateration of radio signals, it must emit at least the roaming signal to contact the next nearby antenna tower, but the process does not require an active call.
 The Global System for Mobile Communications (GSM) is based on the phone's signal strength to nearby antenna masts.
The Siemens S40 is a mobile phone.
 Originally developed as the Bosch 1886 in 2000, the phone was branded as the Siemens S40 after Siemens acquired the Bosch mobile phone division.
 The Siemens S40 is a tri-band mobile phone that operates on the GSM-900, GSM-1800, and GSM-1900 networks.
 Communication with a computer can be done either through the infrared port (IrDA) on the phone or a USB or serial port data cable.
 Its more distinctive features include the voice memo recorder, the mute feature for conversations, the ability to record phone conversations, and the ringtone composer (a useful alternative for those unsatisfied with the 47 monophonic ringtones).
 Another notable fact about this phone is its very low SAR (specific absorption rate) of 0.33, making it #10 on the CNET's list of ten lowest-radiation cell phones as of 2005.
 Also it was one of the first phone with HSCSD.
The "GU230" is a mobile phone manufactured by LG Electronics.
 The phone is designed to be low cost, and provide the essentials.
Mobile Internet growth is the growth of the Internet when accessed via a mobile phone, laptop, etc.
 At one time, half the world had mobile phones.
 The articles in 2007-2008 were slightly misleading because the real story at the time was that the number of mobile phone subscriptions had reached half the population of the world.
 In reality many people have more than one subscription.
 For example, in Hong Kong, Italy and Ukraine, the mobile phone penetration rate has passed 140% (source wireless intelligence 2009).
 By 2009 even the number of unique users of mobile phones had reached half the planet, when the ITU reported that the subscriber number was to reach 4.6 billion user which means 3.8 billion activated mobile phones in use, and 3.4 billion unique users of mobile phones.
 The Mobile Internet data connections are following the growth of mobile phone connections albeit at a lower rate.
 In 2009 Yankee Group reported that 29% of all mobile phone users globally were accessing browser-based internet content on their phones.
 According to the BBC, there are now (2010) over 5 billion mobile phone users in the world.
M Dot Mobile or simply known as M.Mobile is an R&D and mobile communication design company based in Malaysia.
 M.Mobile is Malaysia's first cell phone manufacturer and is also the world's first Muslim-owned mobile phone R&D and marketing company, in a partnership between Malaysia and China.
 This company is currently in operation under its parent company, Kosmo Technology Industrial Berhad ().
 Kosmo announced the acquisition of a 30% stake in Malaysia’s first and only full-fledged mobile phone company, M.Mobile in February 2006.

Question: Where is the company head quarters that makes the GU230 mobile phone?
Answer: Yeouido-dong, Seoul, South Korea,