Mobile Devices

Nokia 6125 Mobile Phone Teardown

16 January 2007
The following is an overview of a teardown analysis conducted by IHS Benchmarking.

Main Features

Mid-Range Quad-Band GSM/GPRS/EDGE clamshell phone. Main features include a 1.8 262K color TFT primary display, a 1.4" 65K CSTN secondary display, a 1.3MP camera, WAP browser, music player supporting MP3, FM radio, a MicroSD expandable memory card slot, Bluetooth, IrDA and USB connectivity.

Nokia 6125 Mobile Phone Main ImageNokia 6125 Mobile Phone Main Image


The Nokia 6125 is a flip phone with a feature set that is quickly becoming the mainstream - namely a 1.3MP camera, Bluetooth, etc. The phone is relatively compact in size and with full set of connectivity options ranging from Quad-band EDGE enabled worldwide accessibility to IrDA. In terms of entertainment, it features a 1.3MP camera, FM radio, music player with expandable memory slot which supports virtually unlimited music and of course downloadable games and ringtones.

Target Market

Mainstream phone with no particular standout aspirations - per Nokia press release ""for consumers of a classic mobile phone".


Begin shipping in Q2 2006, per press release from Nokia

Pricing and Availability

Available in Europe and Asia Pacific but currently not available in the US

Retail for approximately 230 Euros, per press release from Nokia

Volume Estimations

Nokia continues to dominate handset marketshares, with Nokia estimates at almost exactly 1/3rd of overall worldwide handset shipments in 2006 and 2007. Volumes overall are high - but Nokia has so many models, and variations of features and styling that individual models may not always be produced in the very high volumes (>10M).

Our production volume assumptions are derived from several sources including iSuppli's Design Forecast Tool (DFT) and other wireless area research. Based on iSuppli's estimates we arrived at our assumption of approximately 3M units produced over the production lifespan (generally assumed at 2 years for handsets). For the purposes of this analysis, we upped this estimate to 4.5M units based on customer feedback.

As a reminder, volume production assumptions primarily affect our cost analysis in terms of amortized NRE and tooling costs, especially for custom components specific to the model being analyzed (mechanical components especially).

Market Sector / Performance

Per iSuppli research we estimate total Nokia shipments of estimate of 6M quad-band EDGE handset shipments in 2006; with the introduction by Nokia of 1 quad-band in 2005 and an estimate of 3 quad-band introduced in 2006.

Function / Performance

No testing was performed on the Nokia 6125

Nokia 6125 Mobile Phone Cost AnalysisNokia 6125 Mobile Phone Cost Analysis

Cost Notes

Main Cost Drivers Representing approximately 55% of total materials costs

Intel - RD38F4050L0YBQ0 - MCP - 256Mb NOR Flash + 64Mb PSRAM

Freescale - SC29336VKP - DBB - Digital Baseband Processor

Wintek - WD-X1216X3-6CLWo - Display Module - 1.75' Diagonal, 65K CSTN, 128x160 Pixels

ATI - IMAGEON 2240 - Multimedia Co-processor

Camera Module - VGA CMOS, 1/6' Format - Fixed Lens

Bluetooth Module

Freescale - MC13890 - ABB - Analog Baseband / Power Management

Motorola - SNN5779A - Battery - Li-ion - 3.7V, 700mAh

Freescale - MMM6025 - Transmit Module - PAM - Quad-Band GSM/GPRS, w/ Integrated Antenna Switch

High Intensity Blue LEDs

Freescale - MC13877F - RF Transceiver - Quad-Band GSM/GPRS, ZIF, Integrated VCO

Unitech - Main PCB - 8-Layer - FR4/RCF HDI, 2+4+2

Motorola - SPN5189A - Charger - 5.0V, 550mA

Materials and Manufacturing*

* - The total materials and manufacturing costs reported in this analysis reflect only the direct materials cost (from component vendors and assorted EMS providers), manufacturing and test. Not included in this analysis are costs above and beyond the manufacture of the core device itself - cost of shipping, logistics, marketing and other channel costs including not only the OEM's margin, but that of other resellers. Our cost analysis is meant to focus on those costs incurred in the manufacture of the core device (phone, battery, charger, some accessories, and packaging and literature) itself.

Manufacturing Notes

Country of Origin / EMS provider

This Nokia 6125 was produced (final assembly, that is) in Germany, per markings on the device itself. It is more and more rare to see handsets produced in very high-cost Germany, even though there are some benefits and offset savings in total landed cost for handsets consumed in Europe the loaded labor rates are one of the highest worldwide, and even the smallest of hand assembly time assumptions produce a very high calculated manufacturing cost.

Nonetheless, for the purposes of having some economies, it was assumed that PCBAs and plastics, etc are from Nokia suppliers and EMS providers in Eastern Europe, and that only final manufacturing takes place in Germany. We generally assume that where not noted, that sub-assemblies and some custom manufactured items (plastics, mechanicals, etc.) will be produced in the lowest cost country in a given region (Europe, Asia, etc.) in the absence of proof to the contrary. We therefore assumed that the PCBA was assembled in Eastern Europe, and that the custom mechanical components were also produced in E. Europe. This is not known - and these are merely assumptions.

Design for Manufacturing / Complexity

The total component count of the 6125 at 593 components approaches the higer end of the spectrum with respect to other clamshell designs but is well within norms. Clearly there is more functionality and complexity in this design, and it is reflected in the overall component count.

Component counts have a direct bearing on the overall manufacturing cycle times and costs, and also can increase or decrease overall yields and re-work. Our calculations of manufacturing costs factor counts and more qualitative complexities in the design.

The cost of manufacturing is also affected by the assumed production volumes (which increase or decrease the per unit amortized cost of certain NRE, tooling and other up-front charges), as well as the country of final assembly, being Germany in this case, where our assumed loaded skilled (technical) and semi-skilled labor rates is one of the highest worldwide.

Design Notes

The design of the Nokia 6125 appears to be the higher end version of Nokia Platform. The DBB has a higher pin count and larger footprint than previously seen DBBs in Nokia phones. This DBB is appeared to be an OMAP1710 or its derivative, which is EDGE capable. For some reason the ABB has been split up to two devices, NMP#4396177 & 4376533, which very few information is known but we have seen it in 6280 3G phone. These baseband chips appear to be part of Nokia's new BB5 platform.

Samsung, as usual, plays in the memory section but this time with a 'first time' sighting of a NOR Flash + DDR SDRAM MCP. DDR SDRAM has not previously been seen in mobile phone applications we have analyzed to date. Usage of such a device in the 6125 appears to enhancing processing time for the MCU and DSP in the DBB.

In the PAM section, the 6125 features a RFMD quad-band device which the 6280 also has. From previously seen phones, RFMD has been the prime supplier of PAMs in Nokia's design while Agilent and Renesas rarely appeared in the PAM section.

ST Microelectronics's quad-band RF IC is featured here as many of Nokias do. It has the largest pin counts (144 pins) among all Nokia's GSM phones we have seen and is also the first Nokia quad-band EDGE RF chip.

The phone also features a Bluetooth V2.0+EDR chip from CSR. This is actually the first time we see a V2.0+EDR device in regular mobile phones (though we have seen it in the Blackberry 8700c which is a tablet). The Philips FM radio chip is a very common chip across all cell phones and it seems that Philips is the sole supplier to many of the manufacturer in this sector.

Here is a summary of the major components used in Nokia 6125 design:

Main PCB


  • DBB - Digital Baseband Processor - Texas Instruments - NMP #4377223
  • ABB - Analog Baseband Processor / Power Management - ST Microelectronics - NMP #4396177

Battery / Power Management

  • ST Microelectronics - NMP #4376533 - ABB - ASIC


  • Samsung - K5G5629ATB - MCP - 256Mb Muxed NOR Flash + 128Mb DDR SDRAM, 1.8V, Top Boot


  • RF Micro Devices - NMP #4355845 - PAM - Quad-Band, GSM/GPRS/EDGE

RF Transceiver

  • ST Microelectronics - NMP #4380163 - RF Transceiver - Quad-Band, GSM/GRPS/EDGE

User Interface

  • CSR - BC41B143A - BlueCore4ROM - Single Chip Solution, V2.0+EDR
  • Philips Semiconductor - TEA5761UK - FM radio

Camera Module

  • Camera Module - Manufacturer Unknown
  • Image Sensor - Samsung - S5K4A2FA - 1.3MP, CMOS, 1/4' Format - 2.8um x 2.8um Pixel Size, 3.60mm x 2.85mm Active Image Area, 5.7mm x 5.4mm Sensor Size

Display Module

  • Primary: 1.8' Diagonal, 262K Color TFT, 128x160 Pixels, 36mm x 29mm Viewable Area
  • Secondary: 1.4' Diagonal, 65K CSTN, 96x65 Pixels, 28mm x 22mm Viewable Area


Nokia 6125 Mobile Phone - Disssembling Main Half - Bottom ViewNokia 6125 Mobile Phone - Disssembling Main Half - Bottom View

Powered by CR4, the Engineering Community

Discussion – 0 comments

By posting a comment you confirm that you have read and accept our Posting Rules and Terms of Use.
Engineering Newsletter Signup
Get the Engineering360
Stay up to date on:
Features the top stories, latest news, charts, insights and more on the end-to-end electronics value chain.
Weekly Newsletter
Get news, research, and analysis
on the Electronics industry in your
inbox every week - for FREE
Sign up for our FREE eNewsletter
Find Free Electronics Datasheets