With standard BLE Android has a maximum of usually 6 packets per interval and iPhone 4 per interval. Has anyone tried with length extension on. Does the number of packets per interval increase or stay the same? If it does not then appending multiple packets into a longer one would be the best solution to increasing throughput. If it doesnt would probably be best to leave it as is for compatibility with both BLE 4.1 and 4.2 phones.
We have not tested the throughput with this modification.