Where is it cheaper to buy SIM cards in Thailand?

SIM cards in Thailand can be purchased at the airport upon arrival at counters, at travel agencies, and even from private distributors who usually meet tourists upon arrival at international airports and in tourist hotspots. But the most profitable option is to buy a local (non-tourist) prepaid SIM card, which is called "prepaid". This will cost several times less than buying ready-made tourist packages. For example, a SIM card for a month with 30GB of internet will cost 199 baht, and 10GB for 10 days can be bought for just 99 baht. You can buy such SIM cards in supermarkets, most easily in 7-11 stores, or at mobile phone shops and stores. To purchase, you need a passport so that it can be activated in your name. More details about buying a local SIM card and which tariff to choose are described here - https://nashaplaneta.net/asia/thai/sviaz-internet-thailand-pokupka-prepaid-sim-karty

Where to go in Thailand for the first time?
Do I need a category "A" license to rent a motorbike?
Can I exchange rubles in Phuket?
Follow the link, all these questions are discussed in the chat - https://t.me/thailand_travel_chat