I bought my Iphone 4 from Sprint. I have little or no internet service. When I go into extended network areas, my phone sends old text messages to my friends, repeatedly. Is this a Sprint issue?

Question

I bought my I-Phone 4s from Sprint. The salesman raved about how much faster my internet would be with Sprint, also told me 4g was being added my area, and it would be even faster. Well now 4g is here. All of my friends on AT&T enjoy 4g, while I am only getting 3g, my internet is so slow, I rarely use it!
Last week I visited the Sprint store where I purchased my phone, to find out what the problem was. They told me NONE of the I-Phones were capable of getting 4g??????  Wow, Has anyone else been blatantly lied to by Sprint.
The other issue I am having is: every time I leave my home area, and go into the extended area network, and then return into my home area, my phone starts resending old text messages to my friends, that they had recieved days ago!. Of course the Sprint Personnel argued with me and said those were just messages that never went through the first time. I have screenshots of the duplicate messages from my friends, phones.
My I-Phone was great for the first 2 months. this month my I-Phone has completely quit 3 times, Sprint says a tower is down every time I call in to report it.
Is anyone else having these problems with the I-phone 4s?

Answer 1

You are not alone on issues related to weak signals.  It happens to us all regardless of the carrier in the US. 
I have an iPhone4, legally unlocked with replaceable SIM that I use here In Australia, the US and Europe.  I simply replace the SIM to phone accounts in other countries.  Do have issues at home here in Australia from time to time, but many more problems in the US than any other country.
When the signal is weak, ususally 1 bar the phone does not have enough power to stay connected.  It will attempt to receive and send, but is trying to process so much that the signal cannot cope. 
If any employee from Sprint, ATT or any other carrier attempts to tell you it is you and not their system they are out right lying.  Just as they lied when they told you that the iPhone was 4G.  Some try to get around the issue by saying 3GLite, but that really does not apply either because of the mobiles frequency range. 
In fact the Australian government fined Apple AUD$2.25 million + $330,000 in costs for advertising that the new iPad was 4G and LTE, which it is not.  There is currently another legal challenge over the iPhone4S.
If you have anything in writing from Sprint that says 4G then you need to contact your states attorney general.  At least file a complaint with both Sprint and the FCC.  If they tell you it is 4G then they either are lying or they do not have a clue to the mobile.
When the signal is weak the phone keeps attempting to send anything that you have sent.  Sometimes that means multiple sends if the signal keeps dropping to low and it has to try all over again.
One way around the problem is by using an internet or data based app like Viber or WhatsApp.  Both are voice, text and data Apps that will use Wi-Fi first then 3G if Wi-Fi is not available.  Because they use the data side of your mobiles plan it does not take as much power or size to receive or send.  Plus, because they are primarily Wi-Fi then data bases they do not use as much time or text units.  You can find them online or through the Apple App Store.
Iv used Viber for years because I can use it overseas or talk, video, text or msg internationally without use of any mobile plan time.
Rember to that in the states you have I think 72 days to return a mobile to the carrier without any charges. 
I use ATT in the states and when I am at home here I get almost no signal ... I depend 99% on Viber or WhatsApp to even talk.