Trying to use ATT Motorola Atrix phone with my Tmobile service and Galaxy S4 Sim card

Ok for example... if your mobile carrier is ATT you can't use the Sim Card of TMobile. That why the cellphone ask you for the network unlock pin. Your cellphone is locked for the carrier mobile services.

https://www.google.co.uk/webhp?sourceid=chrome-instant&rlz=1C1CHBD_en-GBGB719GB719&ion=1&espv=2&ie=UTF-8#q=I+broke+my+sim+reader+on+my+Galaxy+S4+Zoom+can+i+replace+it ..not sure if any off theses links will help you out

LG invalid sim solution
model GS 190

Contact your network provider for the unlock pin.

No it won't work. Boost mobile uses a different network than tmobile. However you can unlock an ATT phone for tmobile.

You may have to call TMobile Customer Service to get it to work. I had to do that with Tracfone.

call your service company (i.e. sprint tmobile, altell.) they can provide you with a code or they might be able to get you a whole new phone... tmobile has done both for me….
Please rate my solution I need feedback J thanks

You can get the Motorola W510 Subsidy code from Classicunlocking.com .Here they provide the code with free instruction to unlock from tmobile..To get the code you have to fill the Country ,network name and IMEI number..

Well, first off, an iPhone won't work at all with a T-Mobile SIM card. American iPhones are locked to AT&T's network -- only AT&T SIM cards will work in them.

As far as activating it with AT&T, make sure that the iPhone isn't connected to the computer while you install iTunes. Once iTunes is installed, connect the iPhone to the computer and iTunes should launch automatically and begin the activation wizard. Just follow the instructions on the screen and answer the questions.

ATT runs off of the 850 mhz bandwith while tmobile uses 900. The old phone you are using uses tmobiles bandwith and only catches 850 occasionaly. I would suggest trying to get an upgraded from ATT when you signed the contract