Download the app called textnow and register a number in the USA. You can call from Thailand to USA through the app like it's a local call. Just need internet or wifi and it's good. Use it to call grandma and the bank in Canada etc.

Tuk tuk too expensive.

Regular taxi (pink car, green car with yellow, red car with yellow) while they wait at airport they offer substantial higher rates. Hoping the tourist doesn't know about the following apps

Grab app is good for taxi cars. A bit more $$. Can connect to you bank.

Bolt is a cheaper option to get but doesn't have as many cars as grab. Can connect to your bank

Indrive is a cheaper option aswell they only take thai cash as payment

Grab, bolt, or Indrive may show up in a taxi car described above but you will pay the app price and not full taxi price. Most taxi drivers operate 2 or more apps to get business.

Grab app you can also buy food delivery with aswell as food panda and lineman app.

Use Google hotels to search for hotels and area. It will show you dates and prices... Click on those through Google and it's cheaper than booking through agoda, booking, and vio.com) but also use vio agoda and booking for best prices to stay..

Clicktogothailand.com for tour trips from most destinations in Thailand best price options..

12go.asia is a good website for booking buses and vans to go from destination to destination.

Lazada app is similar to Amazon. You can order anything here and have delivered to you place of stay.

No problems

Yes