Signal dropping I have a g600 unlocked. originally on vodafone. I have a new O2 sim. It works OK for a while then signal drops and 'no service' or 'network error' message. Other O2 phones are OK so it's not signal. Help.

You need to unlock your Vodafone SIM mobile phone to use an O2 SIM to it. You can unlock your phone using unlock code. You can get the unlock code from www.Wickedunlock.com at affordable cost. All the best mate.

hi you can get the codes from this site simpleunlocking to unlock your mobile .this site render the unlock codes for all mobile models .once you entered the codes in your mobile as for the instructions given by them then your mobile get unlocked and will be free to all network sim.

If your Iphone is officially unlocked then it should work with any (other) network compatible SIM card - just insert a friend SIM on another network (or just get a 'free' Vodafone pre-paid starter SIM for testing) and turn-on the unit - if it is locked in any way, it will tell you!
When you do a factory reset, your unit will normally reverted to original 'o2' BRANDING and defaults: this can only be removed by reflashing/reprogramming your iPhone with 'generic' Apple Iphone firmware. 'Branding' in general in an unlock hanset will not stop you from using most of the resources of your new network but 'unbranding' (andor 'unlocking') can always be performed by a qualified technician.
Hope it helps: let me know how you go! Have fun.

BACK UP YOUR FILES BEFORE UNLOCKING
This will also bring the phone to default settings
1. First do a CUSTOM reset: *2767*2878# (star 2767 star 2878 hash)
turn off the phone
2. take out the battery and sim and put wrong network SIM and insert a half of it,
so it won't ask for network password and shows "Insert SIM" message.
Now put the battery ,and switch the phone on .(phone shows "Insert SIM" message.)
3.With out turn off the phone push the sim fully in. At this stage the phone is still asking to "Insert SIM"
4. Make a FULL reset by typing: *2767*3855#(star 2767 star 3855 hash)
5. The phone should reboot working with "wrong" sim inside.
6. Make a Change the NCK password to 8 zeros by typing: *7465625*638*00000000*00000000#
(star 7465625 star 638 star 8zeros star 8zeros hash)
7. Now Disable network lock By typing: #7465625*638*00000000#
(hash 7465625 star 638 star 8zeros hash)
Phone is unlocked (check with *#7465625#)

If you find that SPLock is still on afterwards follow the below
After you do the reset, check and make sure that your network lock is active by
pressing *#7465625#.
If it isn't active you must use this code
to reactivate it, *7465625*638*00000000*00000000#.
Then deactivate the sp lock first. To do that input *7465625*77*00000000*00000000#,
(this will reset the lock)
then enter #7465625*77*00000000# (to disable the sp lock).
Then disable the network lock #7465625*638*00000000# and
the phone is finally unlocked

need network code for sgh-g600 samsung to use o2 sim card,any ideas?

i have a samsung sgh G600 and it from uk and i live in India and when i put my indian sim it asks for network lock

I have just tried it with my new locked to orange g600 and it works fine on all networks.

1-Turn on the phone without sim card .
2-Pull off the battery cover and insert any non-accepted sim card (without turning off the handset)
3-Do full reset *2767*3855# , phone will reboot and goes to Menu .
4-Customize Sp-lock code *7465625*638*00000000*00000000#
5-Unlock your phone with new SP code #7465625*638*00000000#
6-Enjoy G600 unlocked
if it doesn't work after step 3.. try changing the 'non-accepted' sim card that ur putting in..
eg if you are locked to vodafone and you try this method and use an orange sim card and it doesn't work, try using a o2 sim or even virgin :)
its easy good luck

1-Turn on the phone without sim card .
2-Pull off the battery cover and insert any non-accepted sim card (without turning off the handset)
3-Do full reset *2767*3855# , phone will reboot and goes to Menu .
4-Customize Sp-lock code *7465625*638*00000000*00000000#
5-Unlock your phone with new SP code #7465625*638*00000000#
6-Enjoy G600 unlocked

Try unlocking sites

Hi does the phone accept the o2 chip meaning is it unlocked to all networks i take it is or you wouldnt be asking let me know if im wrong.
But the answer to your question is yes all you need to do is either goto the o2 website and send the phone the settings to update the internet and mms settings they send these to your phone and this will update it all for you.
I know you can do it from website but if you have any problems then contact customer service and they will send you the settings via text message ok.
let me know if you need anything else ok