More Proactive SIMs

AT&T inspired me to explore a little more.

After my encounter with proactive SMS from an AT&T SIM, I decided to start checking other SIMs as well. I know nearly all SIMs support proactive features, but I am interested to see just how many SIMs actually use them. So I have set up my test bench to test the SIMs I have.

The SIMs

In this first round, I am limiting my testing to SIMs from the big “tier-1” operators, SIMs that are use by large numbers of people. Here is what I have on-hand:

• AT&T (already covered but listed here for completeness)
• Verizon
• T-Mobile USA
• Vodafone Romania
• Orange Romania

All of these SIMs were issued between 2014 and 2019.

The Test Bench

The test bench is the same as in the first article, repeated here for convenience:

• The SIMTrace2 tool, which sits between the SIM and the phone, allowing us to sniff the communication between them.
• A host phone. I used an Allview Soul.