[Galaxy S I9000 Q&A, Help & Troubleshooting] ncho2233:
Hi, I had an problem with fast battery drainage as well. I believe I traced it to the bands that the phone was trying to access. I am also on Rogers.

Go to the dialpad, enter *#2263# to enter BAND SELECTION.

There are four choices. Try to get them to look like this:

[1] AUTOMATIC []

[2] WCDMA BAND [*]

[3] GSM BAND []

[4] COMBI BANDS []

Under [2] WCDMA BAND, should aim for:

[1] WCDMA ALL[]

[2] WCDMA 2100(FDD I)[]

[3] WCDMA 1900(FDD II)[*]

[4] WCDMA 900 (FDD VIII) []

[5] WCDMA 850 (FDD V)[*]

Under [3] GSM BAND[], only [2] GSM 850[*] is selected.

Under [4] COMBI BANDS[], selected items are 1, 6, 8 as below:

[1] GSM 850 [*]

[2] GSM 900[]

[3] DCS1800[]

[4] PCS1900[]

[5] WCDMA 2100 (FDD I)[]

[6] WCDMA 1900 (FDD II)[*]

[7] WCDMA 900 (FDD VIII)[]

[8] WCDMA 850 (FDD V)[*]

I'm no expert, but using the battery history service menu:

*#*#4636#*#*

it seemed that the phone was using up spending a lot of time searching on bands that Rogers wasn't using. Before I made these changes, under BAND SELECTION, my phone had

[1] AUTOMATIC [*] selected.

As well, under [2] WCDMA BAND[], looked like this:

[1] WCDMA ALL[]

[2] WCDMA 2100(FDD I)[*]

[3] WCDMA 1900(FDD II)[*]

[4] WCDMA 900 (FDD VIII) [*]

[5] WCDMA 850 (FDD V)[*]

and under [3]GSM BAND[]:

[1]GSM ALL[]

[2]GSM 850[*]

[3]GSM 900[*]

[4]GSM 1800 [*]

[5]PCS 1900[*]

[4] COMBI BANDS[]:

[1] GSM 850 [*]

[2] GSM 900[*]

[3] DCS1800[*]

[4] PCS1900[*]

[5] WCDMA 2100 (FDD I)[*]

[6] WCDMA 1900 (FDD II)[*]

[7] WCDMA 900 (FDD VIII)[*]

[8] WCDMA 850 (FDD V)[*]

Here's how I changed it:

1. make sure that under BAND SELECTION [1]AUTOMATIC[*] is selected.

2. select [4]COMBI BANDS, make sure all the bands are selected. If any are missing, such as [8]WCDMA 850 (FDD V)[], just click on them to add, and you'll see "Add WCDMA_W850[*] If you want to add other bands in present bands, choose band that you want again". Use menu key, then select "back", then back out in to the main band selection screen again.

3. select [2]WCDMA BAND[] submenu. You should see:

[1] WCDMA ALL[]

[2] WCDMA 2100(FDD I)[*]

[3] WCDMA 1900(FDD II)[*]

[4] WCDMA 900 (FDD VIII) [*]

[5] WCDMA 850 (FDD V)[*]

4. select [5] WCDMA 850 (FDD V)[*]. Should see: Select WCDMA_W850 Only [*]. back out (menu, back). Now should see:

[1] WCDMA ALL[]

[2] WCDMA 2100(FDD I)[]

[3] WCDMA 1900(FDD II)[]

[4] WCDMA 900 (FDD VIII) []

[5] WCDMA 850 (FDD V)[*]

5. back out to BAND SELECTION again. Should look like this:

[1] AUTOMATIC []

[2] WCDMA BAND [*]

[3] GSM BAND []

[4] COMBI BANDS []

enter [4]COMBI BANDS[], should look like:

[4] COMBI BANDS[]:

[1] GSM 850 []

[2] GSM 900[]

[3] DCS1800[]

[4] PCS1900[]

[5] WCDMA 2100 (FDD I)[]

[6] WCDMA 1900 (FDD II)[]

[7] WCDMA 900 (FDD VIII)[]

[8] WCDMA 850 (FDD V)[*]

This is showing that your phone will only seek service on WCDMA 850, which Rogers happens to use.

You can back out with menu, back, menu, end at this point, and check what band your phone is using:

To check what band your phone is using, from the dialpad, *#0011#. You could, for example, restrict your phone to WCDMA 850 and see if it can pick up a signal.

I went back and added, under COMBI BANDS, items [1] and [6] as previously mentioned above:

[1] GSM 850 [*]

[2] GSM 900[]

[3] DCS1800[]

[4] PCS1900[]

[5] WCDMA 2100 (FDD I)[]

[6] WCDMA 1900 (FDD II)[*]

[7] WCDMA 900 (FDD VIII)[]

[8] WCDMA 850 (FDD V)[*]

I noticed that when I added these bands under [4]COMBI BANDS, that [2]WCDMA BAND[*] changed to:

[1] WCDMA ALL[]

[2] WCDMA 2100(FDD I)[]

[3] WCDMA 1900(FDD II)[*]

[4] WCDMA 900 (FDD VIII) []

[5] WCDMA 850 (FDD V)[*]

I notice that my phone will sometimes use 850 and sometimes 1900 on Rogers.

Again, I'm not sure if this will help you, but it might be worth a shot. The battery history screen is also useful *#*#4636#*#* and checking partial wake usage and network usage since last unplugged to see which programs are using most of the battery. It was from this that I figured out the dialer was using a lot of the battery. It could also be some other network intensive programs such as a twitter client.

Please report back as I'm interested to know if this helps at all. Cheers!