Question about Sony Ericsson Z550i Cellular Phone

1 Answer

Network problems Hi everyone, My sister's Z550i has a problem with network connection. It does not "hook up" to the operator's network, which is the biggest/best operator where we live. She cannot text, call or anything that has to do with network connection. Her phone began to act weird a couple of days ago when we were at the movies, she had it turned off. Then when she turned it on again, after the movie, it had no network signal and it has been like this since. (We were in town... we live in town, so I doubt that it has to do with the operator since we checked if it was her sim-card going weird, but it wasn't - checked it on my phone, and the sim worked). After the movies, her phone said "Inactive SIM" when it worked perfectly on my phone (SE Z610i). Now it tells the operator and all on the monitor, but it still fails to connect to the network. This has never happened before on her phone. Thank you :3

Posted by on

  • 3 more comments 
  • poke_pikachu May 03, 2008

    She updates the software on regular basis so I doubt it has anything to do with that.

    Just did the master reset, it doesn't work.

    Thanks anyways.

  • sparsh May 11, 2008

    hi,i have a network problem on my z550i phone.there is no signal.even i reset the phone but there is no i want from you a good method so that it works properly.

  • sweetsank Jan 09, 2009

    how to flash my z550? where i get softwere for it

  • Anonymous Jan 27, 2009

    i am having same probkem

  • rdeva98 Feb 03, 2009

    My model Z550i .

    I cannot use text mgs, call but can use bluetooth
    it has a problem with network connection
    it had no network signal (showing "Inactive SIM")

    I did the master reset and it doesn't work too,
    still fails to connect to the network.

    What can i do?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,944 Answers


This could be a software failure. A master reset or software update could solve this problem,.

Posted on May 03, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Sony ericsson z550i do not insert sim card form mobile

It may be due to network lock,
you can unlock it and switch over to another network , you can get unlock codes here
you need to specify the country and network provider

Nov 03, 2010 | Sony Ericsson Z550i Cellular Phone

1 Answer

When i insert the sim in my mobile z550i he show the phone lock code i don't know what the code how to troubleshoot this problem please help me


To unlock your mobile you need to get network unlock code(NUC) from current service provider via phone or go to service provider office.

While you get the Network unlock code ,the service provider customer care officer will ask for your personal details to check whether the mobile belongs to you only.If they are satisfied with your answers they will provide with the network unlock code.


To get restriction code you have to call your previous service provider. This code is provided to prevent in case of theft taken place the other person cannot use your phone in other networks.

While you get the restriction code ,the previous service provider customer care officer will ask for your personal details to check whether the mobile belongs to you only.If they are satisfied with your answers they will provide with the restriction code.


Jul 30, 2010 | Sony Ericsson Z550i Cellular Phone

1 Answer

My phone had a network problem and after using it for some time it went off.what can i do?

Initially check the mobile with other network operator sim card to ensure problem occurs in that also .Normally this problem is due to the Network and other IC in the mobile.Better contact a good service person to solve the problem

Jun 11, 2010 | Sony Ericsson Z550i Cellular Phone

1 Answer

Computer connects to wireless router, but doesn't authenticate

what is the operating system of the computer? add the network manually in the Preferred Networks then restart the computer.

Sep 15, 2009 | Linksys WRT160N Wireless Router

2 Answers

No access to netwotk in sony ericsson Z550i

Hi Ravindra, the first thing I would suggest is trying your SIM card in a different phone. This will tell us if the problem is with your phone or the network.

If the problem is with your phone, I have fixed similar problems on Sony phones by flashing the firmware. It sounds scary, but Sony makes it really easy to do. You will need a USB cable to hook your phone up to your computer, then go to and download the update software. The software does the rest, it's easy as pie and has fixed many problems I've had with Sony phones.

Aug 21, 2009 | Sony Ericsson Walkman W810i Cellular Phone

1 Answer

Xbox won't connect to live through my laptop

When you connect the laptop to the router are you using a network cable?
When you connect two computers such as your laptop and the xbox using a network cable you need a crossover cable not a standard network cable.
If you use a network hub you can connect two or more computers together using the standard network cables.

Jul 28, 2009 | Microsoft Wireless Network Adapter Xbox...

1 Answer

My sony-ericsson z550i display says no network and no coverage area.

go to settings-->phone-->network, try selecting the manual network option, if its able to find a network, you can request register on it, once back to main screen select "automatic" in network so you don't have to search your provider network everytime you loose signals.

Mar 25, 2009 | Sony Ericsson Z550i Cellular Phone

1 Answer

Network unlocking (for all models)
please go on this site and unlock ur phone

Jan 31, 2008 | Sony Ericsson Z550i Cellular Phone

1 Answer

GPRS Settings

sir kindly call ur network operator

Dec 20, 2007 | Sony Ericsson Z550i Cellular Phone

Not finding what you are looking for?
Sony Ericsson Z550i Cellular Phone Logo

Related Topics:

81 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Ericsson Cell Phones Experts

Computer Repairing
Computer Repairing

Level 3 Expert

14641 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Sandeep Shenoy

Level 2 Expert

187 Answers

Are you a Sony Ericsson Cell Phone Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides