You can do 90 days reports by mail, on-line or even using another person. but it seems the queus are still to long in Phuket with foreigners loving to do it by themselves in person.
Phuket Immigration introduce the new 90 day report:
Drive Thru, sorry no coffee, french fries or other treats.
TLDR : Answer Summary
In Phuket, you can submit your 90-day report via mail, online, or through another person. However, many expatriates prefer to do it in person, leading to long queues at the immigration office. Recently, Phuket Immigration introduced a new drive-thru option for the 90-day report submission, although it does not provide any refreshments.