My mom is having a lot of the same issues. She is somewhat tech savy doesn't understand a lot about what goes on in networking issues. let me see if I can explain.
She has had two of these replaced. I am not sure if it is the t-mobile network or her phone its self doing this. but when she is not connected to wifi and just using t-mos network her phone wont load and a lot of time tells her she don't have a data plan. her so called "4g" network, is slow. I have had three virgin mobile androids this year. The samsung intercept, Lg Optimus V, and Motorola Triumph. The intercept was the worse phone I ever owned. I loved (for the most part) the Optimus, except for the fact that the phone had poor ram when playing some games such as Angry Birds (it would lag a lot), but over I loved the Optimus because I figured that I could use it as a mobile hotspot with out rooting the phone. and now for a week I have had the Motorola triumph. better graphic interface and bigger screen. I love it but the downfall of the phone is there wasn't swype keyboard on the phone and I had to get the beta from swype. But the RAM of the phone is better then that of alot of the Droids. I had to root my phone to get mobile hotspot. Anywho my phones on VM 3g network is faster then her mytouch 4g on t-mobiles network.
the other day when we didn't have home internet she said her phone was doing it again I said because her phone sucks. She said it worked fine on WiFi. I had to set there and explain to her that when she was on WiFi she was using the IP behind that WiFi network and not t-mobile's network.
I explained to her that I could root her phone install custom ROMs that could make her phone work better. but she is afraid of the no warrenty after words. I told her I could Root her phone, install a custom ROM set it up for her, and if it doesn't work right I can set the stock ROM back to the phone and unroot the phone and it would be like nothing has happened to it.
anyone want to help me convince my mom to let me root her phone. I should her the amazing things I have done with my Triumph since I rooted it and installed a custom ROM on my phone.