Series 40

Nokia Series 40 is a user interface for mobile phones based on Nokia OS. It previously was 1.5 billion phones sold with the user interface .. All Series 40 devices are based on an ARM processor core and support a variety of different cellular standards such as GSM, UMTS and CDMA2000.

Series 40 is used as the basis for a simpler operating system than the smart phone interfaces S60, Series 80 and Series 90, based on the multi-tasking operating system Symbian OS. Series 40 devices differ from symbian based platforms is that they do not support true multi-tasking and do not have a native code API for other manufacturers, which can be installed only written in Java MIDlets. The lack of multitasking is the reason that the Series 40 user interface more responsive and faster acting than other Nokia platforms, but is much slower when running additionally installed applications.

In the past, Series 40 devices were limited to smaller screen resolutions such as 128 × 128 pixels. With the introduction of the Nokia 6270 and the Nokia 6280 ( and with them the third generation of Series 40 surface ) were screen resolutions up to QVGA ( 240 × 320 pixels ) is possible. The current 6th edition of the Series 40 allows even display resolutions of HVGA (320 × 480 pixels). Since the introduction of Series 40 6th Edition Feature Pack 1 on the Nokia X3- 02, the Series 40 interface also supports touch screen.

Meanwhile, the S40 Platform is managed as Asha platform. The surface has been thoroughly revised and extended by known features of smartphones. Asha devices are therefore referred to as Nokia smartphones, but this is debatable, since the Asha -Platform still does not have a full-fledged multitasking and can not install native apps. The devices form an intermediate category between smartphones and feature phones. Target markets include developing countries in Africa, Asia and South America, and the low-cost sector in Western countries as a starter smartphone.

Software

Standard applications are an XHTML browser and an e -mail program with POP3 and IMAP support. The XHTML browser can access most web content through the XHTML / HTML gateway of the wireless service provider.

One limitation is the missing link of the e -mail application with other applications; selecting an email address from the address book, or click on a email link on a web page does not open the e- mail program. Some models even have two e- mail applications; the "real" IP / GPRS -based, and a pseudo e- mail client that is trying to send the message via the SMS / SMTP gateway service provider.

Support for SyncML synchronization with external services PIM applications is available. Many Series 40 devices have to obtain this synchronization settings through a text message with configuration settings. A manual editing is not possible for all parameters.