H A N D P H O N E U S E R S S U R V E Y 2 0 1 7
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Sampling technique
The survey adopted confidence level of 95% and precision of ±2%. There was
only one stage of sample selection as the survey adopted a simple random
sample (SRS) approach. Sampling was done across networks with probability
proportional to size of the networks in terms of subscriptions.
Terms and definition
Basic phones
1
Basic phone also called ‘low-end’ phones - are devices with limited feature
sets, limited or no factory-installed or user-installable value added third party
applications, and no or very limited data connectivity. The ‘basic’- or ‘low-end’
- appellation is a throwback to the early days of the emergence of GSM mobile
technology, where only basic functionality - such as call functions, SMS,
Unstructured Supplementary Service Data (USSD) v1 functionality, and a
phonebook - were needed (and available) to communicate.
Feature phones
2
Feature phone has limited functionality and proprietary operating systems
such as Bluetooth, WAP-based phone browsers and ability to install and run
Java applets and applications and a camera. This device primarily use
narrowband 2G EDGE/EDGE+ speeds for mobile data access. Several feature
phone produced support of 3G network.
1
Source: Mobile Handset Use in Digital Financial Services (03/2017), ITU
2
ibid
Sampling technique
Terms and definition