Install only Cisco IOS Release 15.3(3)JA1 and newer releases on Cisco Aironet Universal Access Point models. Do not install older Cisco IOS releases on Cisco Aironet Universal Access Point models as that is a violation of local radio regulations and laws. You can install the 32 MB Cisco IOS Release 15.2(4)JB3a on all 802, 1040, 1140, 1260, 1550, 1600, 2600, 3500, and 3600 series access points. Access Points 702 and 1530 support 128 MB minimum flash and AP 3700 supports 64 MB minimum flash.