Will the simcard in my iPhone 4 work in a Sony Xperia Z?

I'm going to upgrade my phone to the Sony Xperia Z and I wanted to know a little more about sim cards.

By putting my current simcard into a new phone will I get the same service I'm getting right now? And if so is it compatible for my new phone?

Is there anything else i'll need to know?

Everything will be the same but you must just see that is Xperia z using micro sim if they do then you can just put in or else you will need to get a new sim but there will be no promblem

  • Would you buy the new Sony Xperia Z over iphone 5? Http://www.sonymobile.com/gb/products/phones/xperia-z/ This is sony's answer to iphone 5 and Galaxy S3 but is it good enough?
  • Will my iphone 4 sim card work in a sony xperia phone? I just got the iphone 4 on contract (yes stupid I know) but i'm going to buy a sony xperia phone to make up for it, I can't lost my contract though so can I put my iphone 4 sim card (the one on the contract) into a sony xperia prepaid phone?
  • Which is Better Sony Xperia Z or iPhone 5? I want to buy a new phone, but I'm confused. Xperia Z has quad core, android JB, 2 GB ram, Full HD display and 13MP camera. Iphone 5 has dual core, ios6, 1GB ram, decent display and 8MP camera. i heard that Xperia z screen and the camera quality is not good. And iPhone 5, i'm new to ios, previously i was an android user, and pretty much i know how the OS is. But ios, i don't have an idea. Please suggest me a good phone and tell me why it's good than the other
  • What is better, the iPhone 4 of Sony Xperia J? I want to know in terms of performance, speed. Can anyone help me please and I would prefer people with experience of both handsets to give there opinion.