Ours was a connecting flight from Bangkok to Phuket. As we were having a layover of 4 hrs at Don Mueang Airport, we completed the Visa on Arrival process at that airport. Even though it was early in the morning, there was a big queue for the process. You can collect the application form from a desk that is opposite to the process counter.
Documents required to show:-
1 ) Passport
2) Return flight ticket copy/ print out
3) Hotel booking receipt copy showing the no:of days of stay
4) 20,000 baht per family
The officials was not asking to show the 20,000 baht cash or proof. But it's better to keep the same amount in native currency at least. After submitting the above proof, our passport will be stamped with Visa and then they will lead us to a counter to get 'Departure Card' . This card must be kept safe until we reach back to our country. Next is bio-metric process which will be done in 2 or 3 mins based on crowd. Thus we cleared the immigration process and got the permit to travel in Thailand.
We booked the SIM through Klook and we can collect it from the dtac centers in airport. If you are unable to find one you can ask at information desk.
Another thing which you can check at airport is currency exchange. INR exchage rate was 0.25 that is too low(for 10,000 INR you will get only 10,000*0.25=2500 baht where the market rate comes up to 0.40). So the officials itself given a tip to exchange the money at counters in Phuket town/ market itself.
We arrived at Phuket and we had pre-booked the hotel transfer through Klook. It is very cheap and good. Even though we waited for almost 1 hr in airport as cabs was not available. After that our ride was upgraded with a luxury mini-van. Worth of waiting 1 hr. You can find below link for booking cab through Klook. We paid 1300 INR.
Our stay was at Centara Blue Marine Resort & Spa, Kathu, Patong. It was such a beautiful resort having a breath taking view of ocean from our balcony. We were greeted by a soothing welcome drink and then lunch at their pool view restaurant. The hotel is situated around 3km from Patong Beach. Also you will get a 7 Eleven market, motor bike rental shop, exchange shop and few restaurants near the hotel.