Bloetooth only 20 kb/S

no, its totaly normal

i have 20 kB/s speed too

It's all depend on handset cpu speed and big system task that are running at the time too.

So a Nokia 3650 with 100Mhz cpu will be slower when using bluetooth than any handset that having higher cpu speed, say a 200Mhz cpu SE P800 for instant.

If I transfer files an my Handy the CPU-Utilization is between 25 - 40 % - not 100%. It must have other reasons.

I don�t know if the P800 has realy a 200 mhz CPU - i can�t find information about the P800 CPU ?

But the P800 is only a litle bit faster than the Nokia 3650

http://www.jbenchmark.com/

n3650 got 104 MHz cpu and p800 got 122 MHz

Really? Some say 200Mhz and some posted 156Mhz.
So which are the true claimed?

Can any user using latest P800 use below PhoneID software and post the the screenshot? (7650/3650 can use it too)
Many thanks in advance!

The p800 has a 156 Mhz CPU.It was reported that some early prototypes had a 196 Mhz(or similar)CPU.The 3650 has a 104 Mhz CPU.

Bluetooth is class 2 on both,the 3650 and the p800,and has the same or very similar transfer speed,nothing to do with CPU clock.

I've just thought that 3650 due to lower cpu speed actually caused the slow down on the bluetooth speed.

Actually it is quite true that the bluetooth speed is quite dependant on the cpu of the phone (or if not how good the OS/software is optimised with the hardware).

A closer look to the specs of bluetooth shows us that any class 2 capable device can have a max data transfer rate of 723kbps theoritically.

When I connected two PCs through bluetooth I found out that the real speed was way lower (in most cases it didn't pass the 1/3 of the theoritical max data transfer,sth that can be noticed also at WiFi).

Things were even worse with my 7650. The max data transfer was not more than 46kbps (that was the max I have reached). I also didn't found much difference with one of my friends P800 (even if it was faster it would be slightly faster,and hard to notice the difference).

Then again I connected varius phones like t68i/t610 and found out that these phones were even slower that the smartphones.

So either the OS is not working well with the hardware or the hardware used is not top quality.

But on the other side maybe it's none of these. Maybe the Memory of the phones is too slow to follow the speeds of bluetooth (at least that sounds better to me)...

Just in case: Make sure that you're comparing apples to apples. That is, that are you measuring kilobits or kilobytes (KB) and comparing kilobits to kilobits and not kilobits to kilobytes.

Bluetooth's (v1) theoretical maximum is around 720kbps kilobits per second (in one direction), which is about 90 kilobytes per seond, if a byte = 8 bits.

When sending/receiving in both directions, the maximum speed is around 430kbps, which makes it around 54 kilobytes per second (54KBps).

Given that, getting 46KBps sounds about right, but 20KBps is a bit low, but not unheard of (and if it is 20Kbps, then it is low indeed, as it is only 2.5KBps).

So, check the units you use in your estimates/calculations.

N/A I agree with you.

Since a kilobyte is 1024 bytes or 8096 bits and a kilobit is 1024 bits or approximately 128 bytes.

Then 7.90625 is how many Kilobits in one kilobyte

720 divided by 7.90625 is around 90 kilobytes per second
430 divided by 7.90625 is around 54 kilobytes per second

Originally posted by N/A
Just in case: Make sure that you're comparing apples to apples. That is, that are you measuring kilobits or kilobytes (KB) and comparing kilobits to kilobits and not kilobits to kilobytes.

Bluetooth's (v1) theoretical maximum is around 720kbps kilobits per second (in one direction), which is about 90 kilobytes per seond, if a byte = 8 bits.

When sending/receiving in both directions, the maximum speed is around 430kbps, which makes it around 54 kilobytes per second (54KBps).

Given that, getting 46KBps sounds about right, but 20KBps is a bit low, but not unheard of (and if it is 20Kbps, then it is low indeed, as it is only 2.5KBps).

So, check the units you use in your estimates/calculations.

Originally posted by MemphisX
Actually it is quite true that the bluetooth speed is quite dependant on the cpu of the phone (or if not how good the OS/software is optimised with the hardware).

A closer look to the specs of bluetooth shows us that any class 2 capable device can have a max data transfer rate of 723kbps theoritically.

When I connected two PCs through bluetooth I found out that the real speed was way lower (in most cases it didn't pass the 1/3 of the theoritical max data transfer,sth that can be noticed also at WiFi).

Things were even worse with my 7650. The max data transfer was not more than 46kbps (that was the max I have reached). I also didn't found much difference with one of my friends P800 (even if it was faster it would be slightly faster,and hard to notice the difference).

Then again I connected varius phones like t68i/t610 and found out that these phones were even slower that the smartphones.

So either the OS is not working well with the hardware or the hardware used is not top quality.

But on the other side maybe it's none of these. Maybe the Memory of the phones is too slow to follow the speeds of bluetooth (at least that sounds better to me)...

Just because I see some people doubting. All the above measurements are on kbps (kilobits per second and NOT KILOBYTES).

And all of them seem quite normal to me.
The 723kbps is only theoritically and if only you have perfect conditions. And this is a fact not only in bluetooth but anywhere else from dial up to WAN/WiFi and LAN. For example if you have a 56kbps modem you'll notice that you'll never have 56kbps connection (even if you have the best connection, the best phone line and you are very close(less than 3kilometers) to the tellecommunication center).

I also had the happyness to test some WiFi connection (more specific the latests 802.11g). The theoritically max data rate is 54Mbps but I never had more than 10Mbps).

The same goes with my other LANs connection.
My 100Mbps Lan never had more than 65Mbps While the Firewire Lan (Theoritically 400Mbps) never more than 160Mbps. (I still wait to test a Gigabit Ethernet).

There are many factors that won't let us get the max out of a connection...

Normal BT-Speed PC <--> PC (1 m distance) has >60 kb/s - this is a fact.
We talk here about BT not LAN or WLAN or Milk ice.

With speculations we will not find the reason.

Originally posted by MemphisX
The same goes with my other LANs connection.
My 100Mbps Lan never had more than 65Mbps While the Firewire Lan (Theoritically 400Mbps) never more than 160Mbps. (I still wait to test a Gigabit Ethernet).

That's hardwares bandwidth spec.
So if 100Mbps LAN connection, at the sametime with multiple other devices connections on it, are only maximum allow 100Mbps.

Just like most hardwares bandwidth spec like SCSI for instant, never achieve by single drive connection.
I had a server attached with SCSI U320 sub-storage system with 14 pcs of U320 drives in it, never achieve the full U320 320MB/s spec even at full loads.

So let's not drag things too far away from the this topic original asking. Alright?

I have an Ipaq 3870 on my hands.I just tested the Bluetooth transfer rate,and guess what,its the same,arround 20 Kbps.