ESP-01 access point "disappears"

I use AT commands to set a ESP-01 as an access point.
These are the commands I am manually sending it from a terminal program.

AT
AT+GMR
AT+CWMODE_CUR=2
AT+CIFSR
AT+CIPMUX=1
AT+CIPSERVER=0
AT+CIPSERVER=1,8080
AT+CWDHCP_CUR=0,1

About 30 seconds after it is configured, the access point disappears from my smartphone.

What AT command am I missing?