A reader, Denise, writes…
Same old story, different day!! I have an HTC Inspire, which is Android 2.3.3 It’s an AT&T phone but was never activated to any service prior to me and is ‘unlocked’. I have a Straight Talk SIM card that is T-Mobile compatible (that’s what they told me to buy). Well, I can’t get mobile network or send/receive MMS. I have tried a million APN settings. Could the fact that I have an AT&T phone with T=Mobile SIM have something to do with that? I can make calls and regular text, no problem. I bought the SIM sometime around Feb this year.
I am going to assume this is the phone you are using http://www.gsmarena.com/htc_inspire_4g-3706.php
If you are able to make and receive phone calls using the Straight Talk T-Mobile SIM, then your phone is definitely unlocked. I looked at the specs for the phone and I am not sure that your phone will be compatible with data using Straight Talk’s T-Mobile network.
Forget about MMS for a moment and focus on data. Straight Talk uses three APNs: tfdata, wap.tracfone, and att.mvno. If you are using Straight Talk’s T-Mobile SIM your APN is wap.tracfone. Go the the Straight Talk website and look up your APN settings. Use Android 4.0 & 4.1 as your phone type.
On your phone, go the the APN settings, and add your APN. Just the APN don’t worry about the MMS values. Save the APN and restart your phone. Test your data connection. Check your status bar, look for a 3G or E indicator, if you don’t see one, you probably aren’t getting a data connection.
You could also try the Straight Talk app from the Play Store and see if it works.https://play.google.com/store/apps/details?id=com.tracfone.straighttalk.stdatasettings
You may want to consider transferring your service to the Straight Talk ATT SIM. You’ll need an new Straight Talk ATT SIM, you can transfer your current service from the old SIM to the new SIM from the Straight Talk website. If you bought the Straight Talk BYOP Activation Kit at Walmart, the package that came with 4 SIMs and a $45 service pin, then you already have the SIM you need.
This is assuming that you know that the ATT network works well where you plan to use your phone.
Let me know how it goes.