After update to IOS 7x some apps are crashing a lot & system Reboots!

Question

After installing IOS 7.1.1 on 1 x iPhone 4 16GB, 3x iPhone 4s 64GB and 1 iPad mini 64GB, Apps started crashing which worked well on IOS 5.5 & IOS 6. After Updating to IOS 7, the problems started. Some of my favourite games like "Call Of Duty: Black Ops Zombies"and Avengers Initiative keep crashing at the start. "Call Of Duty" reported Low Memory even though I turned off Background App Refresh, Re-downloaded the Apps, performed full system reboot, enabled "Reduce Motion", enabled "Increase Contrast" and still no luck.  I have also deleted many of my Apps to free up storage space but still no improvement. Other problems major problems are that the screen freezes and Apps become unresponsive requiring a full system reboot. This happens very often and also when trying to update or download Apps the system crashes and often Reboots itself. I believe the main problem is with low memory because I ran an App called "Battery Doctor" which shows that 82% of the 512MB RAM is already been used before any Apps have even been started leaving only 89MB of free RAM which is hardly enough to run decent Games on. There are many occasions when FaceTime wouldn't allow Sign In and in iTunes Apps would revert to how they were after applying changes. When adding Contacts, changes would often revert back. Also I have noticed that the iPhone sometimes would display the wrong amount of free Storage space and it would sometimes show like 5GB available and then go to 0MB available and cause crashes during downloads. Another problem I found was that when Apps start up, a white patch shows on the screen temporarily which wasn't apparent before IOS 7x. When adding contacts I noticed that with "Increase Contrast" disabled, some of the entries added did not display while typing with the keyboard and the text was greyed out making it difficult to read what you are typing. Now I wish that I had not updated to IOS 7 as suggested because it has messed up my £700 iPhones and I don't see a way of downgrading without Jailbreaking making my phones worthless. We are very very upset and disappointed because we paid so much money for the devices and have not had them long. We do not want to buy a newer device just because of the update messing up our phones. Also I do not want to try and restore from a previous backup because the last few times I've tried and it does not restore everything. It is very time consuming and I am too ill to go through all that again on each device. Also I believe the restore does not give me the choice of going back to IOS 5.5 or IOS 6. Therefore if Apple could give the opportunity to update to IOS 5.5 or IOS 6 for older devices and have a separate update for IPhone 5s which have a faster processor and double RAM (1GB) then I would be very grateful.  I would also like to add the fact that IOS 7.x.x drains the battery very quickly. After reading the many complaints about IOS 7 update & my personal experience, I now regret updating and also fear that future updates may render my iPhones useless. I bought my iPhone 4s direct from Apple and paid a premium for Factory Unlocked iPhones. I think the iPhones may now be out of warranty and are very unhappy with this situation. Please, please please could you send a fix in another update!

Answer 1

Actually DIESEL they do force you to update. my wife has not update hers yet to ios6 and none of the apps work at full tilt anymore because they are all updated for ios 6....Apple is now making you either update(and ruin your iphone 4s) or buy the new iphone 5(which i doubt will have any of the problems people with iphone 4s are having).
Since updating my 4s i have lost signal, data has been very low at best. i can not access any apps or they open up and do not refresh. I use to have 4bars at my work and now i have 1.