Changing the phone number on your SIM card with a Sony Ericsson K800i

Sony Ericsson K800i
Sony Ericsson K800i

A few weeks ago I moved my mobile phone contract from O2 to T-Mobile/EE at the Carphone Warehouse. It was the first time that I’d ever moved networks since I first got a mobile phone in 2001 or 2002, and the process was very simple. I wanted to keep my old number so this is what I did:

  1. Contact O2 to ask for a PAC. I did it online using their live chat facility.
  2. Buy new mobile phone contact.
  3. Phone customer service on new network (T-Mobile) and tell them the PAC.
  4. Wait 24-48 hours for the old number to transfer over to the new SIM card.

However, I discovered that the SIM card was still reporting the ‘temporary’ T-Mobile number rather than my original number, and it turns out that Android doesn’t provide a way to edit the number stored on the SIM card.

After a couple of hours of searching on Google, I ordered an old Sony Ericsson K800i phone on eBay as it turns out that this device does allow you to edit the number stored on the SIM card. It arrived a few days ago, as did a micro-to-SIM card adapter and today I popped the SIM card out of my new Google Nexus 4 and edited the number on the SIM.

Here’s what I did on the Sony Ericsson K800i:

  1. Contacts
  2. Options
  3. Special numbers
  4. My numbers
  5. Select your main number, it may be called something like “My mobile” or “Line 1” or similar, and press Edit
  6. Enter your new number, e.g. +447123456789
  7. Save

And it worked: Android now reports my original number. I’ve done the same for Jane’s phone too, as she moved from O2 to T-Mobile a few months earlier and experienced the same issues.

Jane has a Samsung Galaxy Ace running Android 2.3.6 (Gingerbread) and it would appear that on this phone/operating system it is essential to make sure the date and time are set correctly otherwise it won’t connect to the internet and will report a “no connection” error.

I’m posting this in case it helps anyone else. Oh, and does anyone else need a third-hand Sony Ericsson K800i?

Published by

Gareth Saunders

I’m Gareth J M Saunders, 47 years old, 6′ 4″, father of 3 boys (including twins). Latterly, web architect and agile project manager at the University of St Andrews and warden at Agnes Blackadder Hall. Currently on sabbatical. I am a priest in the Scottish Episcopal Church, and I sing with the NYCGB alumni choir.

One thought on “Changing the phone number on your SIM card with a Sony Ericsson K800i”

  1. Hi Gareth,thanks for that i just changed to a virgin sim and moved my old orange # over,but it wasnt showing on the phone, so i did what you said & its fine now 🙂 I`m actually still using a k800i as my main phone ! its my 3rd one…..

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