What other phone? Only the E71's SIM works. All other SIMs do not. This has been asked 1093102910 times. If other phones SIM cards worked then we all wouldn't be buying E71s.I did some research and I understand that the sim card from a E71 can be used on most unlocked phone. However, the E71 requires the $45 unlimited plan.
I was wondering if I can just get a $30 all you need plan with a different phone and use that sim card on my Xperia Mini Pro. Would that work?
You need to use the E71. The E71 only works with the $45 plan.
You put those two statements together now.
If you want a $30 plan go to t-mobile, pageplus cellular (verizon reseller), or virgin mobile (sprint).