It has always puzzled me why we have to conduct expensive surveys to find out what mobile operators already know. Every CDR [Call Detail Record] captures the IMEI number of the handset. It’s nothing to report this and thereby support those who are developing apps.
Here is one MNO giving the data:
Huawei was the most popular mobile handset brand among Telenor customers, according to a report from Telenor Myanmar. The report shows 24 percent of Telenor Myanmar’s over 19 million subscribers used Huawei handsets in 2017. Samsung ranked second with 13 percent customer market share, followed by Oppo, Vivo and Xiaomi, respectively. The study further indicates that Apple dropped out of the top five since only one percent of the subscribers throughout Myanmar used its devices to access Telenor’s voice and data services.