I hesitated to write this review, but after the past 3 weeks of run-around, all due to Best Buy, I had to share my tale and caution others to go elsewhere to upgrade their cell phone.  \n\nI've purchased many, many things from Best Buy; I'm going to focus on my experience with their cellular/mobile electronics section.\n\nMy iPhone 4 was in need of an upgrade; Best Buy had the iPhone 5 on sale for $50 less than anyone else.  As fate would have it, they even had a few in stock, so I zipped over to Best Buy on 12/26 to upgrade my phone.\n\nI made it abundantly clear to the gentleman who \""helped\"" me that I didn't want to change anything on my service.  All that I wanted was to upgrade the phone, renew my contract with AT&T (ugh, ick, horrible - like dealing with the devil), and keep everything exactly the same as it was.\n\nHe was extremely casual about the event - too casual, in fact, as he spent the majority of his time texting someone from his own phone.  He went about setting up the new phone, clicked away with his mouse, and at every opportunity was using his own phone to text someone.\n\nHe proclaimed the new phone was set-up, and that I'd get a \""welcome\"" e-mail from AT&T.  I asked if I could confirm that my account was left \""as is\"" - he said that he didn't have any way to provide it to me, other than by e-mail.  I asked directly if my call plan, data plan, text plan, and discount were still in-tact, and he said, \""Yeah, man - don't worry, it's all there.\""\n\nI left with my new iPhone 5, and went about my business.\n\n5 days later, I received a text notice from AT&T stating that I had exceeded more than $100 in texting fees.  \""Impossible!\"" I proclaimed, \""I have unlimited texting!\""\n\nThen it dawned on me that I never received the e-mail as promised from the distracted gentleman who assisted me at BB.\n\nI drove over to the AT&T store on the West Side and inquired about my plan.  The person who assisted me there indicated that Best Buy had not carried over my unlimited texting plan.  He also indicated that Best Buy had dropped my voice plan to a lower level plan.  The AT&T store corrected these items and I went on my way.\n\nFast forward a few weeks, and I realized that I wasn't receiving any visual voicemail services.  iPhone users know what I'm talking about - the little push notifications that show as \""badges\"" when you have an unheard voicemail.\n\nI went back to the AT&T store and asked them to check on the issue.  Once again, Best Buy was the culprit - they had dropped visual voicemail service from my plan at the time of the upgrade.  They clearly showed me on the screen that the changes had taken place on 12/26 - the same day that I upgraded my phone with Best Buy.\n\nThe final straw came when I received my bill, and noticed that my affiliation discount was missing.  I called AT&T, and guess what?  The discount was dropped on 12/26.\n\nSo... if you need to upgrade your phone, I'd urge you to do it elsewhere.  In talking with the AT&T store staff, they all shared horror stories from Best Buy customers.  One person at the west side store said, \""We spend a disproportionate amount of our time fixing problems initiated by Best Buy.\""\n\nBest Buy = 0 stars - FAIL