I agree with you 100%.
This is all PTA's fault.
The hungry b*stards have sold the license of 5 and 10MHz blocks of 2100MHz 3G. For a country as large as Pakistan, 5MHz is barely enough for the twin cities, let alone the entire country.
Abroad, people have minimum 20MHz 3G blocks and around 15-30 MHz of 4G, plus they operate on multiple frequencies.
Here, all operators (excluding Warid) are operating on 2100MHz UMTS band for 3G.
Only Mobilink and Zong have provision to use 10MHz blocks of 3G. This is why Mobilink and Zong 3G are slightly better than other networks during peak times.
It's sad for Ufone and Telenor.
They only get 5MHz each for 2100MHz 3G.
There is a reason they become unusable during peak times.
Lets talk about 4G, same problem.
Only one frequency, 1800MHz. Nothing less, nothing more. Both networks, Warid and Zong operate on the same one. However, since the number of 4G compatible devices is increasing every day, Zong is going from 60-70 Mbps (back when 4G was recently launched), to 20-30 Mbps.
Warid on the other hand was 30 Mbps when recently launched, and has now become slower than a constipated person trying to take a sh*t.
Not a single network can handle the load, the burden of everyone. Warid is struggling, they can barely provide 10 Mbps on their LTE.
Zong, with superior equipment, can still stand on it's feet, but the quality of service is deteriorating day by day. I was thinking of getting myself a MiFi, but I'll be patient till the next PTA auction.
PTA better be quick with their next 3G/4G Spectrum auction, mobile networks can barely cope with the amount of customers demanding 3G/4G services.
Let me explain how it is abroad, each network usually purchases licenses to use either 2 frequencies for 3G, or 2 frequencies for 4G.
If they're financially strong, they may use 2 frequencies for both.
Not all countries have VoLTE support, so voice calls are shifted to 3G, and most data is handled by the 4G equipment.
I'll take the example of Du and Etisalat in the UAE.
Du, uses LTE Band 3 (1800MHz) and Band 20 (800MHz).
Etisalat uses LTE Band 3 (1800MHz) and Band 7 (2600MHz).
Let us put ourself inside a house, in a nice neighborhood in Dubai. The house has thick re-inforced walls. Etisalat users will get 1-2, maybe 3 bars of 4G. Why? Because higher frequencies like 1800MHz and 2600MHz do not pass through walls or thick surfaces as easily as lower frequencies, such as 700 or 800MHz.
This is where Du comes in, their 800MHz band will provide full LTE coverage inside the house. Du even supports VoLTE, so they will have better call quality compared to Etisalat indoors.
However, outdoors, or at public places. Etisalat will give Du tough competition.
Why, you ask?
Etisalat uses 1800MHz and 2600MHz, lower coverage in some areas, but when people are nearer to cell towers, the speed and bandwidth available to a user will be far superior to that of Du, which will be struggling to keep up as the 800MHz band will be of no use. It may provide good coverage, but at a lower bandwidth rate, hence being the inferior network in this case.
However, both networks are good in their own ways.
Warid and Zong only have one frequency.
That too, 1800MHz. The perfect balance between coverage and speed. However, since installing LTE enabled cell towers is expensive, Warid and Zong both struggle to provide us with quality service. Zong's fancy Cat4 equipment might give them an edge over Warid, but in some cases, they're just as crap.
This is because Zong thought it'd be a good idea to make their MiFi cheap as hell so everyone would buy it. Now, they can't handle the traffic.
Hope you guys have understood, some may choose not to read such a long post, but give it a read in your free time. Its just an explanation for those who wonder why 3G/4G suck in Pakistan. 
