A guy I work with had a similar problem with pairing bluetooth with a Bluetooth speaker. After factory resetting his phone he couldn't pair with it any longer. The speaker could only pair with one device at a time. He couldn't figure out how to remove the pairing from that speaker. luckily his phone was rooted, he had to restore his backup from when the phone was paired with it then go into Bluetooth settings and remove the pairing. He then did his factory reset and repaired with the speaker. Some Windows computers have a similar problem , you have to be sure and logout of certain account and unpair certain devices before resetting or you won't be able to log back in or pair the device again.
Not saying your wrong here
I can only assume that your confirming over what I'am saying is to be true
there after factory reset caused your friend to loose the updated release of 3.0 bluetooth of his phone and when he reverted back to his backup it brought the 3.0 bTooth back to his phone which in return allowed him to add his device back in to be recognized ???
More like 56k dialup Hardware--->Bluetooth v2.0/v2.1 + EDR = Enhanced Data Rate
This version of the Bluetooth Core Specification was released in 2004. The main difference is the introduction of an Enhanced Data Rate (EDR) for faster data transfer. The nominal rate of EDR is about 3 Mbit/s, although the practical data transfer rate is 2.1 Mbit/s. EDR uses a combination of GFSK and Phase Shift Keying modulation (PSK) with two variants, π/4-DQPSK and 8DPSK. EDR can provide a lower power consumption through a reduced duty cycle.
The specification is published as "Bluetooth v2.0 + EDR" which implies that EDR is an optional feature. Aside from EDR, there are other minor improvements to the 2.0 specification, and products may claim compliance to "Bluetooth v2.0/v2.1 "
without supporting the higher data rate.
And to me is 2 different capabilities
More like DSL Hardware---> Bluetooth v3.0 + HS= High Speed
Version 3.0 + HS of the Bluetooth Core Specification was adopted by the Bluetooth SIG on 21 April 2009. Bluetooth 3.0+HS provides theoretical data transfer speeds of up to 24 Mbit/s, though not over the Bluetooth link itself. Instead, the Bluetooth link is used for negotiation and establishment, and the high data rate traffic is carried over a collocated 802.11 link.
The main new feature is AMP (Alternative MAC/PHY), the addition of 802.11 as a high speed transport. The High-Speed part of the specification is not mandatory, and hence only devices sporting the "+HS" will actually support the Bluetooth over 802.11 high-speed data transfer.
A Bluetooth 3.0 device without the "+HS" suffix will not support High Speed, and needs to only support a feature introduced in Core Specification Version 3.0 or earlier Core Specification Addendum 1
So if this is to be true would only prove me to be wrong over this UNLESS
His car was Manufactured Equipped with 3.0 beside the 2.0 / 2.1 for latter future updates ????
as for you can't change the hardware just by software more less a like a data switching board
that when his update could have taken it invoked to command to switch to hardware from to??
I been doing my homework lmao ....
I refuse to let anyone down....
P.S
I still Know Madbat deserves higher Prop's than I do.. :thumbup::thumbup: