resulted in reallocation between sales and service revenue as well as marketing expenses while device subsidy is capitalized as contract assets and amortized against the service revenue over the customer

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for users. Given an early stage of 5G technology, there are currently 16 models of 5G device with starting price over Bt10,000. Hence, adoption rate is expected to be limited this year. We continued to

offering had been deployed to attract new customers and prevent churn with 24-month contract, resulted in declining ARPU trend. 2 1Q21 MD&A Advanced Info Service Plc. 1Q21 Operational summary In 1Q21, mobile

re-contract customers with steep discount. Integrated players continued to attract customers with bundling plans (home broadband, mobile and contents) aiming to realize customer value in the long term

under other service revenues and device sales. As the acquisition value was higher than CSL’s net identifiable assets, AIS recognized the value difference as goodwill amounting to Bt2.8bn. With the

10.9 11.4 11.5 Device Penetration 4G-handset penetration 54% 57% 59% 63% 66% Fixed Broadband Business FBB subscribers 623,400 676,700 730,500 795,000 855,400 FBB net addition 51,600 53,300 53,800 64,500

% Prepaid 16.1 17.3 20.9 21% 30% Blended 17.2 19.7 22.6 15% 32% Device Penetration 4G-handset penetration 76% 80% 81% - - Fixed Broadband Business FBB subscribers 1,255,500 1,535,900 1,668,900 33% 8.7% FBB

104 105 -11% 0.5% VOU (GB/data sub/month) Postpaid 16.6 19.8 21.6 30% 8.9% Prepaid 11.1 16.1 16.5 47% 2.4% Blended 12.7 17.2 18.0 42% 5.0% Device Penetration 4G-handset penetration 71% 76% 77% - - Fixed

% Blended 17.0 18.2 19.7 16% 8.2% Device Penetration 4G-handset penetration 75% 79% 80% - - Fixed Broadband Business FBB subscribers 1,202,600 1,431,900 1,535,900 28% 7.3% FBB net addition 112,200 95,000