Hey guys, just wanna give a somewhat long-term review on using the Superior sim Ultra+. br br Little background info: br I split my time between New York and Tokyo so I need an unlocked phone. Contrary to what some people think, buying an unlocked phone in overseas market was difficult, some countries did not have consistent supply . br I had to settle and buy it when I was in New York . Of course the unreasonable practice of AppleAT&T is, paying $600 without contract obligation and yet it's still a locked phone since Last Year. br br I got tired of waiting for the Dev team unlock, I got tired of using the phone as an iTouch and carrying another phone around in Tokyo, so when the Superior Sim Ultra+ solution I find , I had to give it a try. I Visit to Online store ( www.superiorsim.com) where available This Unlock Sim( Superior sim Ultra+) br Also I saw There An Other sim Superior Sim Ultra Gold that was Arround 45$ Then I contact There email superiorgroups@gmail.com and get there support team contact at Skype: IPHONE5DEVELOPER , They Advice Me That if I Have Plan In future To Buy iPhones 5 or 5s So Best Buy Superior sim Gold and If Not So For My iPHOne 4 Modemfirmware 04.12.09 with IOs 7.0.3 Best Superior Sim Ultra+ its total with shipping 32$ So I paid 32$ by Paypal , Then They Send me Superior sim Ultra+ within 7 Days in My Destination at Tokyo. br After Recive this sim(superior sim Ultra +) I Read Guide they provide with sim Verry Simple steps I follow That steps And Unlocked My iPhone 4 Within a Minute. br br After using the phone in Tokyo for 7 weeks, I can honestly say it's very reliable. br The signal is very stable, I have full bar with Softbank Japan Network service. When you do lose service in case of subwayelevatoretc, it always finds the service again when signal becomes available. br I only had to redo the unlock process once. I was on a subway ride to a remote suburb area and lost the service, once signal was back, my phone service was back on, but could not get back on the data service. I had to reboot the phone and do the unlock process. br br if you have a locked phone4, as of now, Superior sim Ultra+ is the way to go, I experienced no negativities of any sorts. Hope that helps Other Members. br Bye.