UK samsung galaxy s2 not registered on network - Galaxy S II Q&A, Help & Troubleshooting

Hi this is my first post was wondering if anyone could help been lookin all over the net for the last few days tried all types of re-sets and nothing has worked......i have been given by my father an S2 which was meant to be sent back to O2 in the UK but he forgot to do it and ended up keeping it but they seem to have blocked it? when i put my O2 sim card into the phone and try to make a call i get Not Registered On Network... i have been told that i may need to reboot from a new rom but i dont have any idea what that is hahaha please help really want to use the phone thanks

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[Q] Please some Advice...Unable to make or recieve calls

hi i really hope someone can give me some advice,ill get straight to it.....
i recently bought my samsung galaxy s2 from ebay,,it was on o2 firmware but the phone was unlocked,i rooted the phone and installed a custom rom,,after a couple days use i changed the sim card and found that although i have 3g reception and can access internet,,i cant make or recieve calls my network has checked and theres no problem there,,and 02 said the phone is definately not locked,,but i cant call out or message and now i cant get the phone to accept the original sim which was working i hope this makes sense and someone can hopefully give me some advice Please
Thamks in Advance
What does it say when you try to call someone?
the phone disconnects immediately with call ended message, when i try to call the phone it says this number is not accepting calls at this moment although virgin say there is nothing wrong,,i also contacted the original operator o2 who aslo say they dont see any problem with the handset,,i cant connect to any other networks at all now,,just get the cant connect to network message try later,,and the only network i do get is virgin the phone says im connected i can access internet through 3g but just cant make or recieve calls or messages,,ive tried flashing original firmware through odin but to no avail,,im gutted only had phone 2weeks and cant make callls,,and as i bought through ebay i have no warranty
Please use the Q&A Forum for questions Thanks
Moving to Q&A
Try to reflash your SGSII. Its fantastic phone but little tricky.
Why wouldn't you have a warranty? You got original receipts? You sure you flashed everything properly?
You might need to send it off for repair.
since it was bought on ebay i dont have receipts,,i have a feeling it may have been disconnected by the o2 network.....in the process of dealing with the seller (fingers crossed)

[Q] Samsung Galaxy S2 - Cannot make calls

Hi People
I recently bought a second hand Samsung Galaxy S2 locked to T-Mobile (UK).
I unlocked it (Chainfire Galaxy S2 Sim unlock utility did not work) using Helroz unlock utility. Installed O2 Sim, phone booted fine. However I cannot make calls with any SIM inserted into the phone.
After much research and many forums later I put android 2.3.3 on the phone - mainly because I only had a single CSC Code (TMU - T-Mobile UK ?), installing Andriod 2.3.3 allowed me to choose a generic CSC Code XEU (*#272*<EMEI>#). This did not help still cannot make calls.
I decided to install Android 2.3.4 samfirmware - still cannot make calls.
I bought a T-Mobile Sim and inserted into the phone the name of the network (T-Mobile) is now shown (previously it said "Emergency Calls Only") but still cannot make calls. I have spoken to T-Mobile and they have assured me that this phone is not barred from their network.
Currently have Android 2.3.5 installed (samfirmware) - still cannot make calls and cannot send texts either.
Any help would be much appreciated - but please speak slow as I am a noob!
I apologise if this issue has been dealt with in another thread.
The plot thickens
I spent some time on the phone with T-Mobile yesterday and this morning my phone CAN make T-Mobile calls.
If I put *#simlock# into the dialler it tells me that the
Network Lock [OFF]
Network Subset Lock [OFF]
SP Lock [OFF]
CP Lock [OFF]
Therefore I assume I should be able to use this phone with other networks, but I cannot use it with Vodaphone or O2.
The CSC code is XEU (*#272*<EMEI>#)
Any help much appreciated.
Help needed
Any help with the above problem would be very much appreciated
having the same issue here tried *#simlock# and everything appeard just like you mentioned did you find a fix for this Im trying to get my gfs phone to connect to giffgaff
Dont like the sound of that. Am seriously looking at getting an S2 on a 24 month contract this week. I dont normally bother with contracts and usually buy factory unlocked, but on seeming to read these were pretty easy to unlock, I figured I had nothing to lose.
Now not so sure. Have you managed to solve this?
pewdle said:
Dont like the sound of that. Am seriously looking at getting an S2 on a 24 month contract this week. I dont normally bother with contracts and usually buy factory unlocked, but on seeming to read these were pretty easy to unlock, I figured I had nothing to lose.
Now not so sure. Have you managed to solve this?
Click to expand...
Click to collapse
My GF bought this through ebay and its looking like its been barred from what the replys on giffgaff are suggesting, plus from googling Id say me and the OP have been the only people that have had this issue so far...The SG2 has been exceptionally reliable so far for myself plus do some shopping around and get a 12 or 18 month contract as 24 months are just overkill

Currently in foreign country

Hey all,
First of all, I dont have the luxury to search extensively through the forum. Since having internet now is already a rare thing.
I have a dutch Vodafone card. Ive chosen a subscription that lets you use 35mb, 20 minutes of calling and 20 minutes of begin called each day.
I use a HTC Desire (bravo) with CM7 (I got that other bootloader, not CWM, cant remember the name.)
Now Im in germany and soon in Austra, Hongery, Croatia, Servia, and Greece.
But I dont have 3g/2g/hspa or what ever kind of connection.
Normaly when Im in holland everything works flawless.
When I restart my phone I have a realy brief moment a internet connection and a phone call connection (2G + 3G). Only this last for 30 seconds - 5 minutes.
Can someone tell me what I can do in a foreign country? I dont got my pc with all the data with me.
Is there some way that I can get my 2g/3g work in the above countries without having to put a new rom on it?
I dont want to lose all my data
Hope to hear from someone soon.
Regards,
Erlerain
I still have this problem, can someone please give a thought about this?
erlerain said:
I still have this problem, can someone please give a thought about this?
Click to expand...
Click to collapse
Are you roaming or using another SIM when you are not in Netherlands?
Swyped from my Samsung Galaxy SII

In need of some assistance:I9300GSMH

Hello, First post here on Xda, Nice to meet you all.
I'm looking for some serious help with my new samsung galaxy S3GSMH International version.
Long story short, My girlfriend lives in germany, While on holiday there I purchased a samsung galaxy s3i9300 and was told it will work in any region any network due to being factory unlocked.
In germany I was using a sim card from VIVA mobile or something of the like and it worked fine.
After I returned home, I switched in my UK Vodafone sim card, A message then popped up saying, Please select sim service:vodafone UK/Vodafone UK prepaid.
So I chose Vodafone UK and clicked on OK, I thought everything was fine untill i tried to make a call and got, Not registered on network.
Now I have searched for days in all types of threads to get this fixed, I have tried flashing stock firmware with odin/emergency recovery Via Kies/Flashing modems/flashing patched modems/patched kernals/Ariza patch/Ariza patch Jb.
My Imei is fine and matches under the battery, The S/N also matches under the battery.
So I just don't understand it, If it asked me to choose which sim service surely that means it has some type of connection with the network? I have full signal bars too.
Is there anything else i need to do to get this working? Because I am at a loss, And I obviously can't take it back due to the shop being in germany
Any help or input is extremely appreciated!

[Q] Not registered on network samsung galaxy s2 GT-I9100

Good day, I desperately need your help I have this phone going for 2 year it started this not registered on network isssue last year in october, till today I cant fix the problem, I restart the phone as a work around but I must say it is really frustrating, I had to buy a second phone just so I dont miss my calls, please can someone out ther send me a solution to this problem, resseting the phone, doesnt help., thanking you in advance
can you please elaborate ? is it always in airplane mode ? is imei no. unavailable ? is it carrier locked ? post as much as you can about the problem so that members can you help you out asap .

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