keyguard may be "off" in settings, but it will be activated anyway every time you finish the call. To make a call, you always have to disable keyguard first (even if it says "off" in the settings menu) Accidental emergency calls are not possible because keyguard is always "on" Peanut-like interconnected silicon key mat 3315s sold in Singapore and Malaysia had a blue backlight for the LCD screen and keypad, as opposed to green in other markets Similar design to its successor, the Nokia 3410 The 3315 was also released in Australia. Most versions of the 3310 could be upgraded to include the additional features of the 3315 by using a data cable. There are two North American variants of the 3310; one is the Nokia 3390, which operates on GSM 1900. The Nokia 3395 is an updated version of the 3390, which includes the additional features of the Asian 3315 model, and it has poor reception if connected to a GSM 850 area. WAP-enhanced models (3330 and 3350) The Nokia 3330 added a CSD-based WAP capability, animated Screensavers, a pinball game named Bumper, and phonebook (stored in the phone memory as opposed to the SIM card in earlier models) with a 100-entry capacity to the model. It also has the capability of downloading Java MIDP apps via WAP (such as Snake II mazes, Bumper tables, and Space Impact chapters). An Asia-Pacific only version, known as the Nokia 3350, was in essence an improved 3330 with WAP, rhythmic backlight alert, animated Screensavers, two-way Navi-Key, dedicated call and hang buttons, Chinese lunar calendar, and a 96-by-65-pixel screen. Some 3350s have back covers that feature a photo-insert window, allowing users to put personal pictures from photographs, magazine cut-outs, etc. AMPS/D-AMPS-based versions (3320 and 3360) The Nokia 3360 and 3320 are related models designed for the U.S. and Canadian markets, respectively. They are externally similar to the 3310 and 3390, but they use Digital AMPS ("TDMA")/AMPS technology rather than GSM. Like the Asian 3350, they include two dedicated call and hang buttons and two soft keys. They also feature an infrared port. Unlike the 3390, the 3360 and 3320 do not support voice dialing. At 136 grams each, they are also slightly heavier than the 3390, which weighs 119 grams. Legacy The Nokia 3310 has a reputation of great durability, and many Internet memes have been made calling the phone "indestructible" or "the